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Mid-infrared quantum cascade detectors for applications in spectroscopy and pyrometry

Quantenkaskaden-Detektoren im mittleren Infrarot für Anwendungen in Spektroskopie und Pyrometrie
: Hofstetter, D.; Giorgetta, F.R.; Baumann, E.; Yang, Q.K.; Manz, C.; Köhler, K.


Sigrist, M.W.:
Selected papers presented at the 7th International Conference on Tunable Diode Laser Spectroscopy, TDLS 2009. Special issue : Held in Zermatt, Switzerland during the period 13 - 17 July 2009
Berlin: Springer, 2010 (Applied physics. B, Lasers and optics 100.2010, Nr.2)
International Conference on Tunable Diode Laser Spectroscopy (TDLS) <7, 2009, Zermatt>
Konferenzbeitrag, Zeitschriftenaufsatz
Fraunhofer IAF ()
electrical property; elektrische Eigenschaft; III-V Halbleiter; III-V semiconductor; Heterostruktur; heterostructure

In this paper, we give an overview of quantum cascade detector technology for the near- and mid-infrared wavelength range. Thanks to their photovoltaic operating principle, the most advanced quantum cascade detectors offer great opportunities in terms of high detection speed, reliable room temperature operation, and excellent Johnson noise limited detectivity. Besides some important features dealing with their fabrication and their general characteristics, we will also briefly present some possibilities for performance improvement. Elementary theoretical considerations adopted from photoconductive detectors confirm that optimization of such devices always involves various tradeoffs.