Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.
2010Influence of the surface potential on electrical properties of Al(x)Ga(1-x)N/GaN heterostructures with different Al-content: Effect of growth method
Köhler, K.; Müller, S.; Aidam, R.; Waltereit, P.; Pletschen, W.; Kirste, L.; Menner, H.; Bronner, W.; Leuther, A.; Quay, R.; Mikulla, M.; Ambacher, O.; Granzner, R.; Schwierz, F.; Buchheim, C.; Goldhahn, R.
Zeitschriftenaufsatz
2010Mid-infrared quantum cascade detectors for applications in spectroscopy and pyrometry
Hofstetter, D.; Giorgetta, F.R.; Baumann, E.; Yang, Q.K.; Manz, C.; Köhler, K.
Konferenzbeitrag
2010Mid-infrared quantum cascade detectors for applications in spectroscopy and pyrometry
Hofstetter, D.; Giorgetta, F.R.; Baumann, E.; Yang, Q.K.; Manz, C.; Köhler, K.
Konferenzbeitrag, Zeitschriftenaufsatz
2009Carrier mass measurements in degenerate indium nitride
Pettinari, G.; Polimeni, A.; Capizzi, M.; Blokland, J.H.; Christianen, P.C.M.; Maan, J.C.; Lebedev, V.; Cimalla, V.; Ambacher, O.
Zeitschriftenaufsatz
2009Determination of surface potential of GaN:Si
Köhler, K.; Maier, M.; Kirste, L.; Wiegert, J.; Menner, H.
Zeitschriftenaufsatz, Konferenzbeitrag
2009Growth and electrical properties of AlxGa1-xN/GaN heterostructures with different Al-content
Köhler, K.; Müller, S.; Waltereit, P.; Kirste, L.; Menner, H.; Bronner, W.; Quay, R.
Zeitschriftenaufsatz
2009H- and D-related mid-infrared absorption bands in Ga(1-y)In(y)As(1-x)N(x) epitaxial layers
Alt, H.C.; Messerer, P.; Köhler, K.; Riechert, H.
Zeitschriftenaufsatz
2009Large-area terahertz emitters based on GaInAsN
Peter, F.; Winnerl, S.; Schneider, H.; Helm, M.; Köhler, K.
Konferenzbeitrag
2009Optical and mass spectrometric investigation of the interaction of hydrogen with nitrogen In (In)GaAsN layers
Alt, H.C.; Messerer, P.; Köhler, K.; Riechert, H.; Kirste, L.
Konferenzbeitrag
2009Quantum cascade detectors
Giorgetta, F.R.; Baumann, E.; Graf, M.; Yang, Q.K.; Manz, C.; Köhler, K.; Beere, H.E.; Ritchie, D.A.; Linfield, E.; Davies, A.G.; Fedoryshyn, Y.; Jäckel, H.; Fischer, M.; Faist, J.; Hofstetter, D.
Zeitschriftenaufsatz
2009The role of gated and ungated plasma in THz detection by field effect transistors
Sakowicz, M.; Lusakowski, J.; Karpierz, K.; Grynberg, M.; Knap, W.; Köhler, K.; Valusis, G.; Golaszewska, K.; Kaminska, E.; Piotrowska, A.
Konferenzbeitrag
2008Coherent acoustic phonons in nanostructures
Dekorsky, T.; Taubert, R.; Hudert, F.; Bartels, A.; Habenicht, A.; Merkt, F.; Leiderer, P.; Köhler, K.; Schmitz, J.; Wagner, J.
Konferenzbeitrag
2008Generation and detection of THz radiation with scalable antennas based on GaAs substrates with different carrier lifetimes
Winnerl, S.; Peter, F.; Nitsche, S.; Dreyhaupt, A.; Zimmermann, B.; Wagner, M.; Schneider, H.; Helm, M.; Köhler, K.
Zeitschriftenaufsatz
2008High-brightness long-wavelength semiconductor disk lasers
Schulz, N.; Hopkins, J.-M.; Rattunde, M.; Burns, D.; Wagner, J.
Zeitschriftenaufsatz
2008High-performance optically pumped GaSb-based semiconductor disk lasers for the 2.Xµm wavelength range
Rattunde, M.; Schulz, N.; Rösener, B.; Manz, C.; Köhler, K.; Wagner, J.; Hopkins, J.-M.; Burns, D.
Konferenzbeitrag
2008Influence of doping profiles on coherent acoustic phonon detection and generation in semiconductors
Hudert, F.; Bartels, A.; Dekorsky, T.; Köhler, K.
Zeitschriftenaufsatz
2008Leistungsstarke Emitter und einfach handhabbare Detektoren für die Terahertz-Time-Domain-Spektroskopie
Dreyhaupt, A.; Peter, F.; Winnerl, S.; Nitsche, S.; Wagner, M.; Schneider, H.; Helm, M.; Köhler, K.
Zeitschriftenaufsatz
2008The response rate of room temperature terahertz InGaAs-based bow-tie detector with broken symmetry
Kasalynas, I.; Seliuta, D.; Simniskis, R.; Tamosiunas, V.; Vaicikauskas, V.; Grigelionis, I.; Nedzinskas, R.; Köhler, K.; Valusis, G.
Konferenzbeitrag
2008The surface potential of GaN:Si
Köhler, K.; Wiegert, J.; Menner, H.P.; Maier, M.; Kirste, L.
Zeitschriftenaufsatz
2008Terahertz detection by the entire channel of high electron mobility transistors
Sakowicz, M.; Lusakowski, J.; Karpierz, K.; Knap, W.; Grynberg, M.; Köhler, K.; Valusis, G.; Golaszewska, K.; Kaminska, E.; Piotrowska, A.; Caban, P.; Strupinski, W.
Zeitschriftenaufsatz, Konferenzbeitrag
2008Terahertz detection by two dimensional plasma field effect transistors in quantizing magnetic fields
Sakowicz, M.; Lusakowski, J.; Karpierz, K.; Grynberg, M.; Knap, W.; Köhler, K.; Valusis, G.; Golaszewska, K.; Kaminska, E.; Piotrowska, A.
Zeitschriftenaufsatz
2008Terahertz emission from a large-area GaInAsN emitter
Peter, F.; Winnerl, S.; Schneider, H.; Helm, M.; Köhler, K.
Zeitschriftenaufsatz
2008THz detection by field-effect transistors in magnetic fields: Shallow water vs. deep water mechanism of electron plasma instability
Sakowicz, M.; Lusakowski, J.; Karpierz, K.; Grynberg, M.; Knap, W.; Köhler, K.; Valusis, G.; Golaszewska, K.; Kaminska, E.; Piotrowska, A.
Zeitschriftenaufsatz
2007Barrier- and in-well pumped GaSb-based 2.3 µm VECSELs
Wagner, J.; Schulz, N.; Rattunde, M.; Ritzenthaler, C.; Manz, C.; Wild, C.; Köhler, K.
Zeitschriftenaufsatz
2007Coherent acoustic phonons in phonon cavities investigated by asynchronous optical sampling
Hudert, F.; Bartels, A.; Janke, C.; Dekorsy, T.; Köhler, K.
Konferenzbeitrag, Zeitschriftenaufsatz
2007Identification of point defects in Ga(Al)NAs alloys
Vorona, I.P.; Mchedlidze, T.; Dagnelund, D.; Buyanova, I.A.; Chen, W.M.; Köhler, K.
Konferenzbeitrag
2007The two-dimensional bigradient effect and its application for GHz-THz sensing
Seliuta, D.; Gruzinskis, V.; Tamosiunas, V.; Juozapavicius, A.; Kasalynas, I.; Asmontas, S.; Valusis, G.; Steenson, P.; Chow, W.-H.; Harrison, P.; Lisauskas, A.; Roskos, H.G.; Köhler, K.
Konferenzbeitrag
2006Coherent acoustic phonons in nanostructures investigated by asynchronous optical sampling
Dekorsy, T.; Hudert, F.; Cerna, R.; Schäfer, H.; Janke, C.; Bartels, A.; Köhler, K.; Braun, S.; Wiemer, M.; Mantl, S.
Konferenzbeitrag
2006Correlation of band formation and local vibrational mode structure in Ga(0.95)Al(0.05)As(1-x)N(x) with 0<= x <= 0.03
Güngerich, M.; Klar, P.J.; Heimbrodt, W.; Volz, K.; Köhler, K.; Wagner, J.; Polimeni, A.; Capizzi, M.; Alt, H.C.; Gomeniuk, Y.V.
Zeitschriftenaufsatz
2006Femtosecond time-resolved optical pump-probe spectroscopy at kilohertz-scan-rates over nanosecond-time-delays without mechanical delay line
Bartels, A.; Hudert, F.; Janke, C.; Dekorsy, T.; Köhler, K.
Zeitschriftenaufsatz
2006Generation of a DC Fiske current by coupling of Bloch and in-plane cyclotron oscillations in a semiconductor superlattice
Kosevich, Y.A.; Hummel, A.B.; Roskos, H.G.; Köhler, K.
Zeitschriftenaufsatz
2006Mg doping profile in III-N light emitting diodes in close proximity to the active region
Köhler, K.; Perona, A.; Maier, M.; Wiegert, J.; Kunzer, M.; Wagner, J.
Zeitschriftenaufsatz
2006Multi-wafer MBE grown InP-based DHBTs for millimeterwave and digital applications
Driad, R.; Lösch, R.; Schneider, K.; Makon, R.E.; Ludwig, M.; Weimann, G.
Zeitschriftenaufsatz
2006New trends in terahertz electronics
Tamosiunas, V.; Seliuta, D.; Juozapavicius, A.; Sirmulis, E.; Valusis, G.; Fatimy, A. el; Meziani, Y.; Dyakonova, N.; Lusakowski, J.; Knap, W.; Lisauskas, A.; Roskos, H.G.; Köhler, K.
Zeitschriftenaufsatz
2006Optically detected magnetic resonance studies of point defects in Ga(Al)NAs
Vorona, I.P.; Mchedlidze, T.; Dagnelund, D.; Buyanova, I.A.; Chen, W.M.; Köhler, K.
Zeitschriftenaufsatz
2006Silicon lens-coupled bow-tie InGaAs-based broadband terahertz sensor operating at room temperature
Seliuta, D.; Kasalynas, I.; Tamosiunas, V.; Balakauskas, S.; Martunas, Z.; Asmontas, S.; Valusis, G.; Lisauskas, A.; Roskos, H.G.; Köhler, K.
Zeitschriftenaufsatz
2006Time-resolved photocurrent spectroscopy of optically excited superlattices and the prospects for Bloch gain
Lisauskas, A.; Blöser, C.; Sachs, R.; Demarina, N.V.; Juozapavicius, A.; Valusis, G.; Köhler, K.; Roskos, H.G.
Konferenzbeitrag
2006Ultrafast fiske effect in semiconductor superlattices
Kosevich, Y.A.; Hummel, A.B.; Roskos, H.G.; Köhler, K.
Zeitschriftenaufsatz
2005Bonding of nitrogen in dilute InAsN and high In-content GaInAsN
Wagner, J.; Köhler, K.; Ganser, P.; Maier, M.
Zeitschriftenaufsatz
2005Broad band THz sensing by 2DEG bow-tie-type diodes
Valusis, G.; Seliuta, D.; Tamosiunas, V.; Sirmulis, E.; Balakauskas, S.; Gradauskas, J.; Suziedelis, A.; Asmontas, S.; Anbinderis, T.; Narkunas, A.; Papsujeva, I.; Lisauskas, A.; Roskos, H.G.; Köhler, K.
Zeitschriftenaufsatz, Konferenzbeitrag
2005Control of the Mg doping profile in III-N light-emitting diodes and its effect on the elecroluminescence efficiency
Köhler, K.; Stephan, T.; Perona, A.; Wiegert, J.; Maier, M.; Kunzer, M.; Wagner, J.
Zeitschriftenaufsatz
2005Dynamics of the electric field in a GaAs/AlGaAs superlattice after femtosecond optical excitation: Application of time-resolved spectroscopic techniques
Lisauskas, A.; Blöser, C.; Sachs, R.; Roskos, H.G.; Juozapavicius, A.; Valusis, G.; Köhler, K.
Zeitschriftenaufsatz, Konferenzbeitrag
2005Electro-optic investigation of the Coherent Hall Effect in semiconductor superlattices
Hummel, A.B.; Blöser, C.; Bauer, T.; Roskos, H.G.; Kosevich, Y.; Köhler, K.
Zeitschriftenaufsatz
2005The evolution of the electric field in an optically excited semiconductor superlattice
Lisauskas, A.; Blöser, C.; Hummel, A.B.; Sachs, R.; Roskos, H.G.; Juozapavicius, A.; Valusis, G.; Köhler, K.
Zeitschriftenaufsatz
2005Improved GaN layer morphology by hydride vapor phase epitaxy on misoriented Al(2)O(3) wafers
Scholz, F.; Brueckner, P.; Habel, F.; Peter, M.; Köhler, K.
Zeitschriftenaufsatz
2005In-Plane shaped GaAS/AlGaAS modulation-doped structures: Physics and applications for THz/SUBTHz sensing
Asmontas, S.; Juozapavicius, A.; Seliuta, D.; Sirmulis, E.; Tamosiunas, V.; Valusis, G.; Köhler, K.
Aufsatz in Buch
2005THz/subTHz detection by asymmetrically-shaped bow-tie diodes containing 2DEG Layer
Seliuta, D.; Tamosiunas, V.; Sirmulis, E.; Asmontas, S.; Suziedelis, A.; Gradauskas, J.; Valusis, G.; Steenson, P.; Chow, W.-H.; Harrison, P.; Lisauskas, A.; Roskos, H.G.; Köhler, K.
Konferenzbeitrag
2005Time-resolved photocurrent spectroscopy of the evolution of the electric field in optically excited superlattices and the prospects for Bloch gain
Lisauskas, A.; Blöser, C.; Sachs, R.; Roskos, H.G.; Juozapavicius, A.; Valusis, G.; Köhler, K.
Zeitschriftenaufsatz
2004Detection of terahertz/sub-terahertz radiation by asymmetrically-shaped 2DEG layers
Seliuta, D.; Sirmulis, E.; Tamosiunas, V.; Balakauskas, S.; Asmontas, S.; Suziedelis, A.; Gradauskas, J.; Valusis, G.; Lisauskas, A.; Roskos, H.G.; Köhler, K.
Zeitschriftenaufsatz
2004Epitaxy and characterisation of dilute III-As(1-y)N(y) on GaAs and InP
Köhler, K.; Wagner, J.; Ganser, P.; Serries, D.; Geppert, T.; Maier, M.; Kirste, L.
Konferenzbeitrag, Zeitschriftenaufsatz
2004Intraband coherence of bloch oscillations after momentum scattering
Nüsse, S.; Wolter, F.; Haring Bolivar, P.; Köhler, K.; Hey, R.; Grahn, H.T.; Kurz, H.
Zeitschriftenaufsatz
2004Microwave sensor based on modulation-doped GaAs/AlGaAs structure
Juozapavicius, A.; Ardaravicius, L.; Suziedelis, A.; Kozic, A.; Gradauskas, J.; Kundrotas, J.; Seliuta, D.; Sirmulis, E.; Asmontas, S.; Valusis, G.; Roskos, H.G.; Köhler, K.
Zeitschriftenaufsatz, Konferenzbeitrag
2004Optical and acoustic intersubband plasmons
Rösch, M.; Batke, E.; Köhler, K.; Ganser, P.
Zeitschriftenaufsatz
2004The realization of long-wavelength (lambda <= 2.3 µm) Ga(1-x)In(x)As(1-y)N(y) quantum wells on InP by molecular-beam epitaxy
Köhler, K.; Wagner, J.; Ganser, P.; Serries, D.; Geppert, T.; Maier, T.; Kirste, L.
Zeitschriftenaufsatz
2004Room-temperature intersubband emission from GaInAs-AlAsSb quantum cascade structure
Yang, Q.K.; Manz, C.; Bronner, W.; Köhler, K.; Wagner, J.
Zeitschriftenaufsatz
2004Wave-function reconstruction in a graded semiconductor superlattice
Lyssenko, V.G.; Hvam, J.M.; Meinhold, D.; Köhler, K.; Leo, K.
Zeitschriftenaufsatz
2003AlGaN/GaN HEMTs on silicon carbide substrates for microwave power operation
Lossy, R.; Chaturvedi, N.; Heymann, P.; Köhler, K.; Müller, S.; Würfl, J.
Konferenzbeitrag
2003Asymmetrically - shaped diodes for microwave - submillimeter sensing
Asmontas, S.; Ardavicius, L.; Balakauskas, S.; Gradauskas, J.; Kozic, A.; Kundrotas, J.; Köhler, K.; Roskos, H.G.; Sachs, R.; Suziedelis, A.; Seliuta, D.; Sirmulis, E.; Valusis, G.
Konferenzbeitrag
2003Bonding of nitrogen in dilute GaInAsN and AlGaAsN studied by Raman spectroscopy
Wagner, J.; Geppert, T.; Köhler, K.; Ganser, P.; Maier, M.
Zeitschriftenaufsatz
2003The coherent Hall effect: Evolution of the Hall current of charge-carrier wavepackets in a semiconductor superlattice
Bauer, T.; Kolb, J.S.; Hummel, A.B.; Roskos, H.G.; Kosevich, Y.; Köhler, K.
Konferenzbeitrag
2003The Hall current of coherent electron wavepackets
Bauer, T.; Hummel, A.B.; Kolb, J.S.; Roskos, H.G.; Kosevich, Y.; Köhler, K.
Konferenzbeitrag
2003Influence of a strong magnetic field on the Wannier-Stark states of an electrically biased GaAs/Al(x)Ga(1-x)As superlattice
Hummel, A.B.; Bauer, T.; Roskos, H.G.; Glutsch, S.; Köhler, K.
Zeitschriftenaufsatz
2003Lifetime of Wannier-Stark states in semiconductor superlattices under strong Zener tunneling to above-barrier bands
Rosam, B.; Leo, K.; Glück, M.; Keck, F.; Korsch, H.J.; Zimmer, F.; Köhler, K.
Zeitschriftenaufsatz
2003Multiwafer epitaxy of GaN/AlGaN heterostructures for power applications
Köhler, K.; Müller, S.; Rollbühler, N.; Kiefer, R.; Quay, R.; Weimann, G.
Konferenzbeitrag
2003New results on high-field transport in semiconductor superlattices
Holfeld, C.P.; Rosam, B.; Meinhold, D.; Glutsch, S.; Schäfer, W.; Zhang, J.; Glück, M.; Korsch, H.J.; Rossi, F.; Köhler, K.; Leo, K.
Konferenzbeitrag
2003Peculiarities of excitonic photoluminescence of selectively-doped GaAs/Al(0.25)Ga(0.75)As structures
Kundrotas, J.; Asmontas, S.; Suziedelis, A.; Valusis, G.; Roskos, H.G.; Köhler, K.
Zeitschriftenaufsatz
2003Quantentopf-Infrarot-Photodetektoren für Hochgeschwindigkeitsanwendungen und Thermographie
Steinkogler, S.
Dissertation
2003Quantitative assessment of Al-to-N bonding in dilute Al(0.33)Ga(0.67)As(1-y)N(y)
Wagner, J.; Geppert, T.; Köhler, K.; Ganser, P.; Maier, M.
Zeitschriftenaufsatz
2003Quenching of transient photoluminescence by strong in-plane electric fields in quantum wells
Kundrotas, J.; Dargys, A.; Asmontas, S.; Valusis, G.; Köhler, K.
Konferenzbeitrag
2003Terahertz optical properties of thin doped contact layers in GaAs device structures
Bauer, T.; Kolb, J.S.; Mohler, E.; Roskos, H.G.; Köhler, K.
Zeitschriftenaufsatz
2003THz dielectric response of a moving electron gas
Sachs, R.; Banyai, L.; Mohler, E.; Köhler, K.; Roskos, H.G.
Konferenzbeitrag
2002Coherent hall effect in a semiconductor superlattice
Bauer, T.; Kolb, J.; Hummel, A.B.; Roskos, H.G.; Kosevich, Y.; Köhler, K.
Zeitschriftenaufsatz
2002GHz-THz detection by asymmetrically-shaped GaAs: Bulk material versus nanostructures
Valusis, G.; Sachs, R.; Roskos, H.G.; Suziedelis, A.; Gradauskas, J.; Asmontas, S.; Sirmulis, E.; Köhler, K.
Zeitschriftenaufsatz
2002High-reliability MOCVD-grown quantum dot laser
Sellin, R.L.; Ribbat, C.; Bimberg, D.; Rinner, F.; Konstanzer, H.; Kelemen, M.T.; Mikulla, M.
Zeitschriftenaufsatz
2002Polarization revival of a Bloch-oscillating wave packet in conjunction with resonant Zener tunneling
Meinhold, D.; Rosam, B.; Löser, F.; Lyssenko, V.G.; Rossi, F.; Zhang, J.-Z.; Köhler, K.; Leo, K.
Zeitschriftenaufsatz
2002Zener tunneling in superlattices in a magnetic field
Meinhold, D.; Leo, K.; Fromer, N.A.; Chemla, D.S.; Glutsch, S.; Bechstedt, F.; Köhler, K.
Zeitschriftenaufsatz
2001Alpha particle induced luminescence from multiple quantum wells
Kundrotas, J.; Dargys, A.; Granja, C.; Köhler, K.; Pospísil, S.; Remeikis, V.; Smith, K.M.
Konferenzbeitrag
2001Changes of MQW photoluminescence under alpha particle irradiation
Kundrotas, J.; Dargys, A.; Valusis, G.; Asmontas, S.; Granja, C.; Pospisil, S.; Köhler, K.
Zeitschriftenaufsatz
2001Chapter 3: Bloch oscillations in semiconductors: Principles and applications
Sudzius, M.; Lyssenko, V.; Löser, F.; Valusis, G.; Hasche, T.; Leo, K.; Dignam, M.; Köhler, K.
Aufsatz in Buch
2001Fano resonances in semiconductor superlattices
Canzler, T.W.; Holfeld, C.P.; Löser, F.; Lyssenko, V.G.; Leo, K.; Whittaker, D.M.; Köhler, K.
Zeitschriftenaufsatz
2001Field-induced delocalization and Zener breakdown in semiconductor superlattices
Rosam, B.; Meinhold, D.; Löser, F.; Lyssenko, V.; Leo, K.; Glutsch, S.; Bechstedt, F.; Köhler, K.; Rossi, F.
Zeitschriftenaufsatz
2001Filling-factor-dependent electron correlations observed in cyclotron resonance
Manger, M.; Batke, E.; Hey, R.; Friedland, K.J.; Köhler, K.; Ganser, P.
Zeitschriftenaufsatz
2001Growth and layer structure optimization of 2.26 µm (AlGaIn)(AsSb) diode lasers for room temperature operation
Simanowski, S.; Mermelstein, C.; Walther, M.; Herres, N.; Kiefer, R.; Rattunde, M.; Schmitz, J.; Wagner, J.; Weimann, G.
Zeitschriftenaufsatz
2001Influence of alpha particle bombardment and postannealing on photoluminescence from GaAs/Al(0.35)Ga(0.65)As multiple quantum wells
Kundrotas, J.; Dargys, A.; Valusis, G.; Asmontas, S.; Köhler, K.; Leroy, C.
Zeitschriftenaufsatz
2001Nonlinear transport in superlattices: Bloch oscillations and Zener breakdown
Löser, F.; Rosam, B.; Meinhold, D.; Lyssenko, V.G.; Sudzius, M.; Dignam, M.M.; Glutsch, S.; Bechstedt, F.; Rossi, F.; Köhler, K.; Leo, K.
Zeitschriftenaufsatz
2000Coupled Bloch-phonon oscillations in GaAs/AlGaAs superlattices: theory and experiment
Dekorsy, T.; Bartels, A.; Kurz, H.; Ghosh, A.; Jönsson, L.; Wilkens, J.; Köhler, K.; Hey, R.; Ploog, K.
Zeitschriftenaufsatz
2000Coupled Bloch-phonon oscillations in semiconductor superlattices
Dekorsy, T.; Bartels, A.; Kurz, H.; Köhler, K.; Hey, R.; Ploog, K.
Zeitschriftenaufsatz
2000Direct observation of depolarization shift of the intersubband resonance
Graf, S.; Sigg, H.; Köhler, K.; Bächtold, W.
Zeitschriftenaufsatz
2000Direct Observation of dynamical screening of the intersubband resonance
Graf, S.; Sigg, H.; Köhler, K.; Bächtold, W.
Zeitschriftenaufsatz
2000Dynamics of Bloch oscillations under the influence of scattering and coherent plasmon coupling
Löser, F.; Kosevich, Y.; Köhler, K.; Leo, K.
Zeitschriftenaufsatz
2000Evolution of energy levels of a GaAs/AlGaAs superlattice under the influence of a strong magnetic field
Bauer, T.; Hummel, A.; Roskos, H.; Köhler, K.
Zeitschriftenaufsatz
2000Excitonic photoluminescence quenching by impact ionization of excitons and donors in GaAs/Al(0.35)Ga(0.65)As quantum wells with an in-plane electric field
Kundrotas, J.; Valusis, G.; Cesna, A.; Kundrotaite, A.; Dargys, A.; Suziedelis, A.; Gradauskas, J.; Asmontas, S.; Köhler, K.
Zeitschriftenaufsatz
2000Femtosecond pulse shaping for coherent carrier control
Heberle, A.; Baumberg, J.; Kuhn, T.; Köhler, K.
Zeitschriftenaufsatz
2000Field-induced delocalization and zener breakdown in semiconductor superlattices
Rosam, B.; Meinhold, D.; Löser, F.; Lyssenko, V.; Leo, K.; Glutsch, S.; Bechstedt, F.; Köhler, K.
Zeitschriftenaufsatz
2000GaN static induction transistor fabrication
Weimann, G.; Eastman, L.F.; Obloh, H.; Köhler, K.
Konferenzbeitrag
2000Generation and manipulation of Bloch wave packets
Löser, F.; Sudzius, M.; Lyssenko, V.; Kosevich, Y.; Dignam, M.; Köhler, K.; Leo, K.
Zeitschriftenaufsatz
2000Industrial application of heterostructure device simulation
Palankovski, V.; Quay, R.; Selberherr, S.
Konferenzbeitrag
2000Midbandgap electro-optic detection of Bloch oscillations
Först, M.; Segschneider, G.; Dekorsy, T.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
2000Observation of coherent zone-folded acoustic phonons generated by raman scattering in a superlattice
Hawker, P.; Kent, A.; Challis, L.; Bartels, A.; Dekorsy, T.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
2000Photon drag investigations of current relaxation processes in a two-dimensional electron gas
Graf, S.; Sigg, H.; Köhler, K.; Bächtold, W.
Zeitschriftenaufsatz
2000Self-Induced Shapiro effect in semiconductor superlattices
Löser, F.; Dignam, M.; Kosevich, Y.; Köhler, K.; Leo, K.
Zeitschriftenaufsatz
2000Technology and performance of AlGaN/GaN HEMTs fabricated on 2-inch epitaxy for microwave power applications
Lossy, R.; Hilsenbeck, J.; Würfl, J.; Köhler, K.; Obloh, H.
Konferenzbeitrag
1999Bloch oscillations in semiconductor superlattices
Lyssenko, V.G.; Sudzius, M.; Löser, F.; Valusis, G.; Hasche, T.; Leo, K.; Dignam, M.M.; Köhler, K.
Aufsatz in Buch
1999Coherent acoustic phonons in GaAs/AlAs superlattices
Bartels, A.; Dekorsy, T.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
1999Coherent zone-folded longitudinal acoustic phonons in semiconductor superlattices. Excitation and detection
Bartels, A.; Dekorsy, T.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
1999Cyclotron mass of correlated two-dimensional electron GAS systems in GaAs
Manger, M.; Batke, E.; Köhler, K.; Ganser, P.
Konferenzbeitrag
1999Dynamics of Bloch Oscillations: Influence of Excitation Conditions
Valusis, G.; Lyssenko, V.; Sudzius, M.; Löser, F.; Hasche, T.; Leo, K.; Köhler, K.
Zeitschriftenaufsatz
1999Field-induced delocalization and zener breakdown in semiconductor superlattices
Rosam, B.; Löser, F.; Lyssenko, V.; Leo, K.; Glutsch, S.; Bechstedt, F.; Köhler, K.
Zeitschriftenaufsatz
1999Grating-coupler excited interface phonos in GaAs/AlAs superlattices
Milekhin, A.G.; Rösch, M.; Batke, E.; Köhler, K.; Ganser, P.
Zeitschriftenaufsatz
1999High frequency optical rectification in bulk GaAs and asymmetric AlGaAs/GaAs quantum wells
Graf, S.; Sigg, H.; Köhler, K.; Bächtold, W.
Konferenzbeitrag
1999Influence of Electric Field on Photoluminescence Quenching in GaAs/AlGaAs Quantum Wells
Asmontas, S.; Cesna, A.; Gradauskas, J.; Köhler, K.; Kundrotaite, A.; Kundrotas, J.; Suziedelis, A.; Valusis, G.
Konferenzbeitrag
1999Infrared and Raman studies of confined and interface optical phonons in short-period GaAs/AlAs superlattices with a grating coupler
Milekhin, A.G.; Rösch, M.; Batke, E.; Zahn, D.R.T.; Köhler, K.; Ganser, P.; Preobrazhenskij, V.; Semyagin, B.
Zeitschriftenaufsatz
1999New Features of Spatial-Temporal dynamics of Bloch Oscillations
Dignam, M.; Köhler, K.; Leo, K.; Litvinenko, K.L.; Löser, F.; Lyssenko, V.; Sudzius, M.; Valusis, G.
Konferenzbeitrag
1999Optical signal and energy transmission for a retina implant
Groß, M.; Buß, R.; Köhler, K.; Schaub, J.; Jäger, D.
Konferenzbeitrag
1999Threshold reduction in pierced microdisk lasers
Backes, S.A.; Cleaver, J.R.A.; Heberle, A.P.; Baumberg, J.J.; Köhler, K.
Zeitschriftenaufsatz
1999Transport parameters of 2D systems derived from microwave transmission experiments
Brensing, A.; Bauhofer, W.; Köhler, K.
Konferenzbeitrag
1998Anharmonicity of Bloch oscillations in GaAs/AlAs superlattices in the case of inhomogeneously broadened excitonic states in a weak electric field
Litvinenko, K.L.; Okhrimenko, I.; Köhler, K.; Lyssenko, V.; Leo, K.; Löser, F.
Zeitschriftenaufsatz
1998Bloch wave packets in semiconductor superlattices: Composition and spatial displacement
Löser, F.; Sudzius, M.; Lyssenko, V.G.; Hasche, T.; Leo, K.; Dignam, M.M.; Köhler, K.
Zeitschriftenaufsatz
1998Coherent control of acoustic phonons in semiconductor superlattices
Bartels, A.; Dekorsy, T.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
1998Coherent dynamics of continuum and excitonic states in quantum confined systems
Bakker, H.J.; Dekorsy, T.; Cho, G.C.; Kurz, H.; Leisching, P.; Köhler, K.
Zeitschriftenaufsatz
1998Coupled cyclotron resonance transitions of bilayer 2DEG systems in GaAs
Hu, C.M.; Batke, E.; Shen, S.C.; Köhler, K.; Ganser, P.
Zeitschriftenaufsatz
1998Direct measurement of the spatial displacement of Bloch-oscillating electrons in semiconductor superlattices
Sudzius, M.; Lyssenko, V.; Valusis, G.; Löser, F.; Hasche, T.; Dignam, M.; Köhler, K.; Leo, K.
Zeitschriftenaufsatz
1998Direct observation of the rotational direction of electron spin precession in semiconductors
Oestreich, M.; Hägele, D.; Schneider, H.C.; Knorr, A.; Hansch, A.; Hallstein, S.; Schmidt, K.H.; Köhler, K.; Koch, S.W.; Rühle, W.W.
Zeitschriftenaufsatz
1998Fano resonances in semiconductor superlattices
Holfeld, C.P.; Löser, F.; Sudzius, M.; Leo, K.; Whittaker, D.M.; Köhler, K.
Zeitschriftenaufsatz
1998Interaction ruled temperature dependence of the electron cyclotron mass in GaAs heterojunctions
Hu, C.M.; Batke, E.; Köhler, K.; Ganser, P.
Zeitschriftenaufsatz
1998Microdisk laser structures for mode control and directional emission
Backes, S.A.; Cleaver, J.R.A.; Heberle, A.P.; Köhler, K.
Zeitschriftenaufsatz
1998Optical control of Bloch-oscillation amplitudes: From harmonic spatial motion to breathing modes
Sudzius, M.; Lyssenko, V.G.; Löser, F.; Leo, K.; Dignam, M.M.; Köhler, K.
Zeitschriftenaufsatz
1998Polariton motional narrowing in semiconductor multiple quantum wells
Baumberg, J.J.; Heberle, A.P.; Kavokin, A.V.; Vladimirova, M.R.; Köhler, K.
Zeitschriftenaufsatz
1998Suppression of dopant redistribution in AlGaAs/GaAs laser-HEMT structures for optoelectronic transmitters grown by molecular beam epitaxy
Gaymann, A.; Maier, M.; Köhler, K.; Bronner, W.; Grotjahn, F.; Hornung, J.; Ludwig, M.
Konferenzbeitrag
1997Coherent signature of differential transmission signals in semiconductors: Theory and experiment
Bartels, G.; Cho, G.C.; Dekorsy, T.; Kurz, H.; Stahl, A.; Köhler, K.
Zeitschriftenaufsatz
1997Coulomb-renormalized intraband dynamics probed by THz emission
Wolter, F.; Haring Bolivar, P.; Bartels, G.; Roskos, H.G.; Kurz, H.; Axt, V.M.; Köhler, K.
Zeitschriftenaufsatz
1997Direct measurement of the spatial displacement of bloch-oscillating electrons in semiconductor superlattices
Lyssenko, V.G.; Valusis, G.; Löser, F.; Hasche, T.; Leo, K.; Köhler, K.; Dignam, M.M.
Zeitschriftenaufsatz
1997Direct measurement of the spatial displacement of bloch-oscillating electrons in semiconductor superlattices
Lyssenko, V.G.; Sudzius, M.; Valusis, G.; Löser, F.; Hasche, T.; Leo, K.; Dignam, M.M.; Köhler, K.
Zeitschriftenaufsatz
1997Enhanced electro-optic modulation by integration on non-radiative centers in a resonant tunneling light emitting diode
Alphenaar, B.W.; Baumberg, J.J.; Köhler, K.
Zeitschriftenaufsatz
1997Excitonic emisssion of THz radiation. Experimental evidence of the shortcomings of the Bloch equation method
Haring Bolivar, P.; Wolter, F.; Müller, A.; Roskos, H.G.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
1997InAs/AlSb/GaSb heterostructures
Wagner, J.; Schmitz, J.; Fuchs, F.; Obloh, H.; Herres, N.; Koidl, P.
Aufsatz in Buch
1997Influence of LO-phonon emission on bloch oscillations in semiconductor superlattices
Wolter, F.; Roskos, H.G.; Haring Bolivar, P.; Bartels, G.; Kurz, H.; Köhler, K.; Grahn, H.T.; Hey, R.
Zeitschriftenaufsatz
1997Molecular beam epitaxy of Al(0.48)In(0.52)As/Ga(0.47)In(0.53)As heterostructures on metamorphic Al(x)Ga(y)In(1-x-y)As buffer layers
Haupt, M.; Köhler, K.; Ganser, P.; Müller, S.; Rothemund, W.
Zeitschriftenaufsatz
1997Molecular beam epitaxy of vertically compact Al(x)Ga(1-x)As/GaAs laser-HEMT structures for monolithic integration
Gaymann, A.; Schaub, J.; Bronner, W.; Grün, N.; Hornung, J.; Köhler, K.
Zeitschriftenaufsatz
1997Optically pumped, indirect-gap Al(x)Ga(1-x)As lasers
Wörner, A.; Westphäling, R.; Kalt, H.; Köhler, K.
Zeitschriftenaufsatz
1997Shape dependence of emission from microdisk lasers
Backes, S.A.; Heberle, A.P.; Cleaver, J.R.A.; Köhler, K.
Zeitschriftenaufsatz
1997Spin flip of excitons in GaAs quantum wells
Snoke, D.W.; Rühle, W.W.; Köhler, K.; Ploog, K.
Zeitschriftenaufsatz
1997Ultrafast acoustic phonon ballistics in semiconductor heterostructures
Baumberg, J.J.; Williams, D.A.; Köhler, K.
Zeitschriftenaufsatz
1997Ultrafast coherent carrier control in quantum wells
Baumberg, J.J.; Heberle, A.P.; Köhler, K.; Kavokin, A.V.
Zeitschriftenaufsatz
1996Bloch oscillations of excitonic and continuum states in superlattices
Leisching, P.; Dekorsy, T.; Bakker, H.J.; Roskos, H.G.; Köhler, K.; Kurz, H.
Konferenzbeitrag
1996Bloch oscillations. Coherent control of wave packet dynamics in superlattices
Lyssenko, V.G.; Valusis, G.; Löser, F.; Hasche, T.; Leo, K.; Köhler, K.; Dignam, M.M.
Konferenzbeitrag
1996Coherent exciton dynamics as a function of quantum-well number
Weber, D.; Feldmann, J.; Göbel, E.O.; Stroucken, T.; Knorr, A.; Koch, S.W.; Citrin, D.S.; Köhler, K.
Zeitschriftenaufsatz
1996Dephasing and selection rules of interband and intraband polarisations in superlattices
Leisching, P.; Dekorsy, T.; Bakker, H.J.; Roskos, H.G.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
1996Dephasing dynamics of wave packets in semiconductor superlattices
Valusis, G.; Lyssenko, V.G.; Klatt, D.; Löser, F.; Pantke, K.-H.; Leo, K.; Köhler, K.
Konferenzbeitrag
1996Dissipative tunneling in asymmetric double-quantum-well system. A coherence phenomenon
Vaupel, H.; Thomas, P.; Kühn, O.; May, V.; Maschke, K.; Heberle, A.P.; Rühle, W.W.; Köhler, K.
Zeitschriftenaufsatz
1996Exciton dephasing in quantum wells. Influence of spectral fluctuation processes
Löser, F.; Neuber, A.; Klatt, D.; Lyssenko, V.G.; Pantke, K.-H.; Leo, K.; Glutsch, S.; Köhler, K.
Konferenzbeitrag
1996Femtosecond coherent fields induced by many-particle correlations in transient four-wave mixing
Schäfer, W.; Kim, D.-S.; Shah, J.; Damen, T.C.; Cunningham, J.E.; Goossen, K.W.; Pfeiffer, L.N.; Köhler, K.
Zeitschriftenaufsatz
1996Field enhanced blockade of the confined energy levels in nanometer scale pillar arrays
Alphenaar, B.W.; Durrani, Z.A.K.; Wagner, M.; Köhler, K.
Zeitschriftenaufsatz
1996Influence of spatial doping correlation on scattering times studied in gated and ungated GaAs/AlGaAs quantum weels under hydrostatic pressure
Brunthaler, G.; Penn, C.; Suski, T.; Wisniewski, P.; Litwin-Staszewska, E.; Köhler, K.
Zeitschriftenaufsatz
1996Influence of the electron-electron and electron-phonon interaction on the cyclotron resonance of 2DEG in GaAs
Hu, C.M.; Batke, E.; Köhler, K.; Ganser, P.
Zeitschriftenaufsatz
1996Intersubband plasmon-phonon modes of a quasi two-dimensional electron gas in GaAs
Friedrich, T.; Rösch, M.; Latussek, V.; Batke, E.; Köhler, K.; Ganser, P.
Konferenzbeitrag
1996Metal-non-metal transition at the crossover from antidots to quantum dots
Lütjering, G.; Weiss, D.; Tank, R.W.; Klitzing, K. von; Hülsmann, A.; Jakobus, T.; Köhler, K.
Zeitschriftenaufsatz
1996Mobility and quantum lifetime in a GaAs/AlGaAs heterostructure. Tuning of the remote-charge correlations
Wisniewski, P.; Suski, T.; Litwin-Staszewska, E.; Brunthaler, G.; Köhler, K.
Zeitschriftenaufsatz
1996Molecular beam epitaxy of GaAs/Al(x)Ga(1-x)As/In(y)Ga(1-y)As heterostructures for opto-electronic devices. Control of growth parameters
Köhler, K.
Zeitschriftenaufsatz
1996Nonlinear optical studies of Bloch oscillations
Leisching, P.; Beck, W.; Kurz, H.; Köhler, K.; Schäfer, W.; Leo, K.
Zeitschriftenaufsatz
1996Novel chips for the communication age-joint effort on III-V electronics a success
Diehl, R.
Zeitschriftenaufsatz
1996Optical study of Bloch oscillations in superlattices
Cho, G.C.; Dekorsy, T.; Bakker, H.J.; Kohl, A.; Opitz, B.; Köhler, K.; Kurz, H.
Konferenzbeitrag
1996Photoluminescence and Raman spectroscopy of single delta-doped III-V semiconductor heterostructures
Wagner, J.; Richards, D.
Aufsatz in Buch
1996Photon drag spectroscopy of a two-dimensional electron system
Sigg, H.; Son, P. van; Köhler, K.
Zeitschriftenaufsatz
1996Quantum coherence of continuum states in the valence band of GaAs quantum wells
Dekorsy, T.; Kim, A.M.T.; Cho, G.C.; Hunsche, S.; Bakker, H.J.; Kurz, H.; Chuang, S.L.; Köhler, K.
Zeitschriftenaufsatz
1996Raman spectroscopy of doping sheets and heterointerfaces in III-V semiconductor structures
Wagner, J.; Schmitz, J.; Newman, R.C.; Roberts, C.
Zeitschriftenaufsatz
1996Relaxation dynamics of electrons between Landau levels in GaAs
Hannak, R.M.; Rühle, W.W.; Köhler, K.
Zeitschriftenaufsatz
1996Resonant polaron coupling of high index electron Landau levels in GaAs heterostructures
Hu, C.M.; Batke, E.; Köhler, K.; Ganser, P.
Zeitschriftenaufsatz
1996Time-resolved optical investigations of Bloch oscillations in semiconductor superlattices
Dekorsy, T.; Ott, R.; Leisching, P.; Bakker, H.J.; Waschke, C.; Roskos, H.G.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
1996Time-resolved study of intervalence band thermalization in a GaAs quantum well
Kim, A.M.T.; Hunsche, S.; Dekorsy, T.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
1996Ultrafast coherent carrier control in quantum wells
Baumberg, J.J.; Heberle, A.P.; Köhler, K.; Ploog, K.
Zeitschriftenaufsatz
1996Ultrafast coherent carrier control in quantum wells
Heberle, A.P.; Baumberg, J.J.; Köhler, K.; Ploog, K.
Konferenzbeitrag
1996Ultrafast hole-lattice thermalization in GaAs quantum wells
Hunsche, S.; Kim, A.M.T.; Dekorsy, T.; Kurz, H.; Köhler, K.
Konferenzbeitrag
1996Ultrafast photon drag detector for intersubband spectroscopy
Sigg, H.; Graf, S.; Kwakernaak, M.H.; Margotte, B.; Erni, D.; Son, P. van; Köhler, K.
Zeitschriftenaufsatz
1995Band-gap renormalization and excitonic effects in tunneling in asymmetric double quantum wells
Tackeuchi, A.; Heberle, A.P.; Rühle, W.W.; Köhler, K.
Zeitschriftenaufsatz
1995Bloch oscillations at room temperature
Dekorsy, T.; Ott, R.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
1995Bloch oscillations in semiconductor superlattices
Roskos, H.G.; Waschke, C.; Victor, K.; Köhler, K.; Kurz, H.
Zeitschriftenaufsatz
1995Coherent dynamics of excitonic and biexcitonic wave packets in semiconductor superlattices
Leisching, P.; Ott, R.; Bolivar, P.H.; Dekorsy, T.; Bakker, H.J.; Roskos, H.G.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
1995Coherent exciton-photon dynamics in single, double, and quintuple quantum wells.
Weber, D.; Feldmann, J.; Göbel, E.O.; Citrin, D.S.; Köhler, K.
Zeitschriftenaufsatz
1995Electron g factor in quantum wells determined by spin quantum beats
Hannak, R.M.; Oestreich, M.; Heberle, A.P.; Rühle, W.W.; Köhler, K.
Zeitschriftenaufsatz
1995Exceptionally slow dephasing of electronic continuum states in a semiconductor
Leisching, P.; Dekorsy, T.; Bakker, H.J.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
1995External-field-dependent enhancement of internal Coulomb interactions in time-resolved four-wave mixing
Beck, W.; Leisching, P.; Kurz, H.; Schaefer, W.; Leo, K.; Köhler, K.
Zeitschriftenaufsatz
1995Four-wave-mixing theory beyond the semiconductor Bloch equations
Axt, V.M.; Stahl, A.; Mayer, E.J.; Haring Bolivar, P.; Nüsse, S.; Ploog, K.; Köhler, K.
Zeitschriftenaufsatz
1995Interaction coupled cyclotron transitions of two-dimensional electron systems in GaAs at high temperatures
Hu, C.M.; Batke, E.; Köhler, K.; Ganser, P.
Zeitschriftenaufsatz
1995Laser emission in indirect-gap AlxGa1-xAs
Westphäling, R.; Wörner, A.; Kalt, H.; Köhler, K.
Konferenzbeitrag
1995Mobility enhancement due to spatial correlation of remote impurity charges in delta-doped AlGaAs/GaAs heterostructure
Suski, T.; Brunthaler, G.; Stöger, G.; Köhler, K.; Wisniewski, P.
Konferenzbeitrag
1995Non-Markovian polarization decay in semiconductor quantum wells by three-beam four-wave mixing
Löser, F.; Klatt, D.; Pantke, K.-H.; Leo, K.; Bakker, H.; Shah, J.; Köhler, K.
Zeitschriftenaufsatz
1995Spin-split cyclotron resonance and spatial distribution of interacting electrons
Hu, C.M.; Friedrich, T.; Batke, E.; Köhler, K.; Ganser, P.
Zeitschriftenaufsatz
1995State-of-the-art III-V semiconductor devices for microwave/mm-wave and optoelectronic applications
Diehl, R.; Schlechtweg, M.
Konferenzbeitrag
1995Time-resolved luminescence of semiconductor heterostructures in high magnetic field
Heberle, A.P.; Haacke, S.; Oestreich, M.; Potemski, M.; Rühle, W.W.; Maan, J.C.; Köhler, K.; Weimann, G.; Queisser, H.-J.
Zeitschriftenaufsatz
1995Ultrafast coherent control and destruction of excitons in quantum wells
Heberle, A.P.; Baumberg, J.J.; Köhler, K.
Zeitschriftenaufsatz
1995Ultrafast far-infrared GaAs/AlGaAs photon drag detector in microwave transmission line topology.
Sigg, H.; Kwakernaak, M.H.; Margotte, A.B.; Erni, D.; Son, P. van; Köhler, K.
Zeitschriftenaufsatz
1995X(5) signature in th four-wave-mixing signal from a GaAs/Al(0.3)Ga(0.7)As superlattice
Bartels, G.; Axt, V.M.; Victor, K.; Stahl, A.; Leisching, P.; Köhler, K.
Zeitschriftenaufsatz
1994Bloch oscillations in GaAs/AlGaAs superlattices after excitation well above the bandgap
Roskos, H.G.; Waschke, C.; Schwedler, R.; Leisching, P.; Dhaibi, Y.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
1994Bloch oscillations in superlattices
Leisching, P.; Waschke, C.; Bolivar, P.H.; Beck, W.; Roskos, H.; Leo, K.; Kurz, H.; Köhler, K.; Ganser, P.
Aufsatz in Buch
1994Bloch oscillations of excitonic wave packets semiconductor superlattices
Leisching, P.; Haring Bolivar, P.; Beck, W.; Dhaibi, Y.; Brüggemann, F.; Schwedler, R.; Leo, K.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
1994Dependence of resonant electron and hole tunnelling times between quantum wells on barrier thickness.
Heberle, A.P.; Zhou, X.Q.; Tackeuchi, A.; Rühle, W.W.; Köhler, K.
Zeitschriftenaufsatz
1994Differences in the growth mechanism of InxGa1-xAs on GaAs studied by the electrical properties of Al0.3Ga0.7As/InxGa1-xAs heterostructures 0.2 equal/smaller than x equal/smaller than 0.4
Köhler, K.; Schweizer, T.; Ganser, P.; Hiesinger, P.; Rothemund, W.
Konferenzbeitrag
1994Doping dependence of the E1 and E1 plus Delta1 critical points in highly doped n- and p-type GaAs: Importance of surface band bending and depletion
Kuball, M.; Kelly, M.K.; Cardona, M.; Köhler, K.; Wagner, J.
Zeitschriftenaufsatz
1994Elimination of long-term calibration drift in molecular beam epitaxy by cooling the source flange
Larkins, E.C.; Thaden, H.; Betsche, H.; Eichin, G.; Ralston, J.D.
Zeitschriftenaufsatz
1994Exciton absorption saturation by phase-space filling: Influence of carrier temperature and density
Hunsche, S.; Leo, K.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
1994Experimental realization of the Bloch oscillator in a semiconductor superlattice.
Waschke, C.; Roskos, H.G.; Leo, K.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
1994Femtosecond intersubband relaxation in GaAs quantum wells
Hunsche, S.; Leo, K.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
1994Influence of Coulombic broadened DX center energy levels on free electron concentration in delta-doped AlxGa1-xAs/GaAs quantum wells
Brunthaler, G.; Seto, M.; Stöger, G.; Köhler, K.
Zeitschriftenaufsatz
1994Instantaneous contribution in time-resolved four-wave mixing from GaAs quantum wells near zero time delay
Kim, D.-S.; Shah, J.; Damen, T.C.; Schäfer, W.; Pfeiffer, L.N.; Köhler, K.
Zeitschriftenaufsatz
1994Internal field dynamics of cohorent Bloch oscillations in supperlattices
Dekorsy, T.; Leisching, P.; Beck, W.; Ott, R.; Dhaibi, Y.; Schwedler, R.; Roskos, H.G.; Kurz, H.; Köhler, K.
Zeitschriftenaufsatz
1994Investigation of Bloch oscillations in a GaAs/AlGaAs superlattice by spectrally resolved four-wave mixing.
Leisching, P.; Bolivar, P.H.; Schwedler, R.; Leo, K.; Kurz, H.; Köhler, K.; Ganser, P.
Zeitschriftenaufsatz
1994Optical properties of low temperature grown GaAs - the influence of a hydrogen plasma treatment
Weber, J.; Köhler, K.; Vetterhöffer, J.
Konferenzbeitrag
1994Photocurrent gain mechanisms in metal-semiconductor-metal photodetectors.
Klingenstein, M.; Kuhl, J.; Rosenzweig, J.; Moglestue, C.; Hülsmann, A.; Schneider, J.; Köhler, K.
Zeitschriftenaufsatz
1994Raman- und Mikro-Ramanspektroskopie an CVD-Diamant und Halbleiter-Heterostrukturen
Behr, D.
Diplomarbeit
1994Terahertz Bloch oscillations in semiconductor superlattices
Dekorsy, T.; Leisching, P.; Waschke, C.; Köhler, K.; Leo, K.; Roskos, H.G.; Kurz, H.
Zeitschriftenaufsatz
1994Time-resolved studies of Bloch oscillations in semiconductor superlattices
Leisching, P.; Dekorsy, T.; Waschke, C.; Roskos, H.G.; Leo, K.; Kurz, H.; Köhler, K.
Aufsatz in Buch
1993Auger recombination in intrinsic GaAs
Strauss, U.; Rühle, W.W.; Köhler, K.
Zeitschriftenaufsatz
1993Comparison of Si delta-doping with homogenous doping in GaAs.
Köhler, K.; Ganser, P.; Maier, M.
Zeitschriftenaufsatz
1993Electronic and optical properties of low-dimensional semiconductor structures
Wagner, J.
Konferenzbeitrag
1993Der Forschungsdrang reicht schon in Terabit-Dimensionen.
Diehl, R.
Zeitschriftenaufsatz
1993Investigation of DX centers in AlxGa1-xAs by space charge spectroscopy.
Wöckinger, J.; Jantsch, W.; Wilamowski, Z.; Köhler, K.
Zeitschriftenaufsatz
1993Observation of Bloch oscillations in a semiconductor superlattice
Haring Bolivar, P.; Leisching, P.; Leo, K.; Shah, J.; Köhler, K.
Aufsatz in Buch
1993Temperature-dependent cyclotron resonances in n-type GaAs
Batke, E.; Bollweg, K.; Merkt, U.; Hu, C.M.; Köhler, K.; Ganser, P.
Zeitschriftenaufsatz
1993World-class results from Germany
Diehl, R.
Zeitschriftenaufsatz
1992Differences in the growth mechanism of InxGa1-xAs on GaAs studied by the electrical properties of Al0.3Ga0.7As/InxGa1-xAs heterostructures 0.2 equal/smaller than x equal/smaller than 0.4
Schweizer, T.; Köhler, K.; Ganser, P.; Hiesinger, P.; Rothemund, W.
Konferenzbeitrag
1992Dissipative dynamics of an electronic wavepacket in a semiconductor double well potential.
Schulze, A.; Meier, T.; Thomas, P.; Luo, M.S.C.; Schäfer, W.; Chuang, S.L.; Damen, T.C.; Ganser, P.; Göbel, E.O.; Köhler, K.; Leo, K.; Schmitt-Rink, S.; Shah, J.
Zeitschriftenaufsatz
1992Effect of photoexcitation on the surface band bending in delta-doped GaAs:Si/Al0.33Ga0.67As double heterostructures.
Richards, D.; Wagner, J.; Fischer, A.; Ploog, K.
Zeitschriftenaufsatz
1992Ion irradiation damage in n-type GaAs in comparison with its electron irradiation damage.
Eisen, F.H.; Bachem, K.H.; Klausman, E.; Köhler, K.; Haddad, R.
Zeitschriftenaufsatz
1992Observation of Bloch oscillations in a semiconductor superlattice
Leo, K.; Bolivar, P.H.; Brüggemann, F.; Schwedler, R.; Köhler, K.
Zeitschriftenaufsatz
1992Optically induced carrier transfer in silicon anti-modulation-doped GaAs/Al(x)Ga(1-x)As single quantum wells
Harris, C.I.; Monemar, B.; Brunthaler, G.; Kalt, H.; Köhler, K.
Zeitschriftenaufsatz
1992Picosecond photodetectors fabricated on low temperature GaAs
Klingenstein, M.; Kuhl, J.; Nötzel, R.; Ploog, K.; Rosenzweig, J.; Moglestue, C.; Schneider, J.; Hülsmann, A.; Köhler, K.
Konferenzbeitrag
1992Polarization dependence of heavy- and light-hole quantum beats
Schmitt-Rink, S.; Bennhardt, D.; Heuckeroth, V.; Thomas, P.; Haring, P.; Maidorn, G.; Bakker, H.; Leo, K.; Kim, D.-S.; Shah, J.; Köhler, K.
Zeitschriftenaufsatz
1992Quantum beats versus polarization interference: An experimental distinction
Koch, M.; Feldmann, J.; Plessen, G. von; Göbel, E.O.; Thomas, P.; Köhler, K.
Zeitschriftenaufsatz
1992Raman spectroscopy of dopant induced local vibrational modes in III-V semiconductors
Wagner, J.
Konferenzbeitrag
1992Resonant electron and hole tunneling between GaAs quantum wells
Heberle, A.P.; Rühle, W.W.; Köhler, K.
Konferenzbeitrag
1992Temperature-induced spin reversal in n-GaAs.
Batke, E.; Bollweg, K.; Merkt, U.; Ganser, P.; Köhler, K.
Zeitschriftenaufsatz
1992Time-resolved four-wave mixing in GaAs/AlAs quantum well structures.
Koch, M.; Feldmann, J.; Plessen, G. von; Meier, T.; Schulze, A.; Thomas, P.; Göbel, E.O.; Köhler, K.; Ploog, K.; Schmitt-Rink, S.
Zeitschriftenaufsatz
1992Tunneling between quantum wells.
Heberle, A.P.; Rühle, W.W.; Köhler, K.
Konferenzbeitrag
1992Tunneling through single AlGaAs barriers
Heberle, A.P.; Rühle, W.W.; Köhler, K.
Zeitschriftenaufsatz
1992Unusually slow temporal evolution of femtosecond four-wave-mixing signals in intrinsic GaAs quantum wells: Direct evidence for the dominance of interaction effects
Schäfer, W.; Jahnke, F.; Damen, T.C.; Kim, D.-S.; Köhler, K.; Schmitt-Rink, S.; Shah, J.
Zeitschriftenaufsatz
199110 Gbit/s monolithic integrated optoelectronic receiver using an MSM photodiode and AlGaAs/GaAs HEMTs.
Hurm, V.; Rosenzweig, J.; Ludwig, M.; Axmann, A.; Berroth, M.; Benz, W.; Osorio, R.; Hülsmann, A.; Kaufel, G.; Köhler, K.; Raynor, B.; Schneider, J.
Konferenzbeitrag
1991Advanced high electron concentration GaAs/AlxGa1-xAs pulse-doped double heterostructure for device application
Bachem, K.H.; Hornung, J.; Hülsmann, A.; Ganser, P.; Köhler, K.; Maier, M.
Konferenzbeitrag
1991Anisotropic electron mobilities of Al0.3Ga0.7As/InxGa1-xAs/GaAs high electron mobility transistor structures.
Schweizer, T.; Ganser, P.; Köhler, K.
Zeitschriftenaufsatz
1991Coherent oscillations of a wave packet in a semiconductor double-quantum-well structure
Damen, T.C.; Göbel, E.O.; Köhler, K.; Leo, K.; Schäfer, W.; Schmitt-Rink, S.; Shah, J.
Konferenzbeitrag
1991Competition between tunneling and exciton formation for photoexcited carriers in asymmetric double quantum wells.
Kuhl, J.; Strobel, R.; Eccleston, R.; Köhler, K.
Konferenzbeitrag
1991Dynamics of free and bound excitons in center-doped GaAs/AsGaAs quantum wells.
Monemar, B.; Kalt, H.; Harris, C.I.; Bergman, J.P.; Holtz, P.O.; Sundaram, M.; Merz, J.L.; Gossard, A.C.; Schweizer, T.; Köhler, K.
Zeitschriftenaufsatz
1991G-factor and effective mass anisotropies in pseudomorphic strained layers.
Hendorfer, G.; Schneider, J.
Zeitschriftenaufsatz
1991Hole-tunneling dynamics in biased GaAs/Al(0.35)Ga(0.65)As asymmetric double quantum wells
Nido, M.; Alexander, M.G.W.; Rühle, W.W.; Köhler, K.
Zeitschriftenaufsatz
1991Indirect stimulated emission at room temperature in the visible range.
Bauser, E.; Kalt, H.; Köhler, K.; Lu, Y.-C.; Rinker, M.
Konferenzbeitrag
1991Indirect-to-direct transition of stimulated emission in AlxGa1-xAs.
Rinker, M.; Kalt, H.; Lu, Y.-C.; Bauser, E.; Ganser, P.; Köhler, K.
Zeitschriftenaufsatz
1991Influence of Gamma-L and Gamma-X crossings on stimulated emission in AlxGa1-xAs.
Rinker, M.; Kalt, H.; Lu, Y.-C.; Ganser, P.; Köhler, K.
Zeitschriftenaufsatz
1991Measurement of the exciton-formation time and the electron- and hole-tunneling times in a double-quantum-well structure
Strobel, R.; Eccleston, R.; Kuhl, J.; Köhler, K.
Zeitschriftenaufsatz
1991Modulation doped inverted and normal GaAs/AlxGa1-xAs heterostructures - influence of Si-segregation on the two-dimensional electron gas.
Bachem, K.H.; Ganser, P.; Köhler, K.; Maier, M.
Zeitschriftenaufsatz
1991Quantum beats of excitons in quantum wells
Leo, K.; Shah, J.; Schmitt-Rink, S.; Schäfer, W.; Müller, J.F.; Köhler, K.; Damen, T.C.; Göbel, E.O.
Zeitschriftenaufsatz
1991Raman spectroscopy for impurity characterization in III-V semiconductors.
Wagner, J.
Zeitschriftenaufsatz
1991Resonance effects in Raman scattering by dopant-induced local vibrational modes in III-V semiconductors.
Newman, R.C.; Koidl, P.; Wagner, J.
Zeitschriftenaufsatz
1991Resonant tunneling in double quantum wells - the cases of strong and weak collisions.
Leo, K.; Shah, J.; Schmitt-Rink, S.; Schäfer, W.; Damen, T.C.; Göbel, E.O.; Köhler, K.
Konferenzbeitrag
1991Subpicosecond four-wave mixing in GaAs/Al(x)Ga(1-x)As quantum wells
Leo, K.; Shah, J.; Schmitt-Rink, S.; Schäfer, W.; Müller, J.F.; Damen, T.C.; Ganser, P.; Göbel, E.O.; Köhler, K.
Zeitschriftenaufsatz
1991Terahertz absorption between split subbands in coupled Quantum Wells.
Cunningham, J.; Köhler, K.; Nuss, M.C.; Roskos, H.; Shah, J.; Tell, B.
Konferenzbeitrag
1991Time-resolved optical investigation of tunneling of carriers through single AlxGa1-xAs barriers
Rühle, W.W.; Heberle, A.P.; Alexander, M.G.W.; Nido, M.; Köhler, K.
Zeitschriftenaufsatz
1991Variations of the confining potential of doped AlGaAs/GaAs Quantum Wells with the photon energy of excitation.
Harris, C.I.; Monemar, B.; Brunthaler, G.; Kalt, H.; Schweizer, T.; Köhler, K.
Zeitschriftenaufsatz
1990Deep donor levels -DX centers- in III-V semiconductors.
Mooney, P.M.
Zeitschriftenaufsatz
1990Electron tunneling via gamma- and chi-states in GaAs/Al0.35Ga0.65As double quantum well structures
Alexander, M.G.W.; Nido, M.; Rühle, W.W.; Reimann, K.; Ploog, K.; Köhler, K.
Zeitschriftenaufsatz
1990Femtosecond transient-grating experiments in quantum wells
Schmitt-Rink, S.; Müller, J.F.; Damen, T.C.; Ganser, P.; Göbel, E.O.; Köhler, K.; Leo, K.; Schäfer, W.; Shah, J.
Konferenzbeitrag
1990Indirect stimulated emission at room temperature
Rinker, M.; Kalt, H.; Köhler, K.
Zeitschriftenaufsatz
1990Indirect stimulated emission at room temperature
Rinker, M.; Kalt, H.; Köhler, K.
Konferenzbeitrag
1990Multicomponent structure in the temperature-dependent persistent photoconductivity due to different DX centers in AlxGa1-xAs-Si.
Brunthaler, G.; Köhler, K.
Zeitschriftenaufsatz
1990A photoluminescence study of the transition from non-degenerate to degenerate doping in n-type silicon doped GaAs/AlGaAs quantum wells
Harris, C.; Monemar, B.; Kalt, H.; Schweizer, T.; Köhler, K.
Konferenzbeitrag
1990Quantum beats from extended electronic states in quantum wells
Müller, J.F.; Schmitt-Rink, S.; Schäfer, W.; Damen, T.C.; Ganser, P.; Göbel, E.O.; Köhler, K.; Leo, K.; Shah, J.
Konferenzbeitrag
1990Quantum beats of free and bound excitons in GaAs/Al(x)Ga(1-x)As quantum wells
Leo, K.; Shah, J.; Köhler, K.; Damen, T.C.
Zeitschriftenaufsatz
1990Quantum beats of light hole and heavy hole excitons in quantum wells.
Damen, T.C.; Köhler, K.; Leo, K.; Shah, J.
Zeitschriftenaufsatz
1990Raman spectroscopy of dopant impurities in homogeneously and planar -delta- doped III-V semiconductors.
Wagner, J.
Zeitschriftenaufsatz
1990Resonant-tunneling transfer times between asymmetric GaAs/Al(0.35)Ga(0.65)As double quantum wells
Alexander, M.G.W.; Nido, M.; Rühle, W.W.; Köhler, K.
Zeitschriftenaufsatz
1990Subpicosecond transient four-wave-mixing experiments. A novel method to study resonant tunneling.
Damen, T.C.; Ganser, P.; Göbel, E.O.; Köhler, K.; Leo, K.; Shah, J.
Zeitschriftenaufsatz
1990Temperature dependence of persistent photo-conductivity due to DX centers in AlxGa1-xAs-Si.
Brunthaler, A.; Köhler, K.
Zeitschriftenaufsatz
1990Tunneling in semiconductor heterostructures studied by subpicosecond four-wave mixing.
Damen, T.C.; Ganser, P.; Göbel, E.O.; Köhler, K.; Leo, K.; Shah, J.
Zeitschriftenaufsatz
1988Analysis of ytterbium arsenide films grown on GaAs by molecular beam epitaxy.
Herres, N.; Richter, H.J.; Seelmann-Eggebert, M.; Smith, R.; Wennekers, P.
Zeitschriftenaufsatz
1986Photoluminescence of neodymium-implanted gallium phosphide and gallium arsenide
Mueller, H.D.; Schneider, J.; Axmann, A.; Ennen, H.
Zeitschriftenaufsatz
1986Photoluminescence optimization and characteristics of the rare-earth element erbium implanted in GaAs, InP, and GaP
Haydl, W.H.; Pomrenke, G.S.; Ennen, H.
Zeitschriftenaufsatz
1985Luminescence of rare earth ions in III-V semiconductors
Schneider, J.; Ennen, H.
Zeitschriftenaufsatz
1982NTG-Diskussionstagung ueber integrierte Optik in Freiburg
Bachem, K.H.; Kist, R.
Zeitschriftenaufsatz