Faculté des sciences

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

Hofstetter, Daniel ; Giorgetta, Fabrizio R. ; Baumann, Esther ; Yang, Quankui ; Manz, Christian ; Köhler, Klaus

In: Applied Physics B : Lasers and Optics, 2010, vol. 100, no. 2, p. 313-320

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... Plus

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    Summary
    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 trade-offs.