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Broad band THz sensing by 2DEG bow-tie-type diodes

Breitband THz Detektion mittels 2DEG Dioden in Fliegenform
: 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.

Acta physica Polonica. A, General physics, physics of condensed matter, optics and quantum electronics, atomic and molecular physics, applied physics 107 (2005), No.1, pp.184-187
ISSN: 0587-4246
ISSN: 0587-4284
International Symposium on Ultrafast Phenomena in Semiconductors (UFPS) <12, 2004, Vilnius>
Journal Article, Conference Paper
Fraunhofer IAF ()
III-V Halbleiter; III-V semiconductor; heterostructure; Heterostruktur; terahertz spectroscopy; Terahertz Spektroskopie; THz

We suggest a novel approach to detect broad band, 0.078-2.52 THz, electromagnetic radiation at room temperature using an asymmetrically-shaped bow-tie diode based on a modulation-doped GaAs/AlGaAs structure. We show that the voltage sensitivity in the range from 0.078 THz up to 0.8 THz has a plateau and its value is within 0.3-0.5 V/W. We consider the bow-tie diode design to increase the sensitivity of the device.