Mid-infrared detectors based on resonant tunneling diodes and interband cascade structures

Andreas Pfenning; Georg Knebl; Anne Schade; Robert Weih; Andreas Bader; Manuel Meyer; Sebastian Krüger; Florian Rothmayr; Caroline Kistner; Johannes Koeth; Martin Kamp; Fabian Hartmann; Lukas Worschech; Sven Höfling

doi:10.1117/12.2324501

18 September 2018 Mid-infrared detectors based on resonant tunneling diodes and interband cascade structures

Andreas Pfenning, Georg Knebl, Anne Schade, Robert Weih, Andreas Bader, Manuel Meyer, Sebastian Krüger, Florian Rothmayr, Caroline Kistner, Johannes Koeth, Martin Kamp, Fabian Hartmann, Lukas Worschech, Sven Höfling

Author Affiliations +

Proceedings Volume 10765, Infrared Remote Sensing and Instrumentation XXVI; 107650U (2018) https://doi.org/10.1117/12.2324501
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

Molecule and gas sensing is a key technology that is applied in multiple environmental, industrial and medical fields. In particular optical detection technologies enable contactless, nondestructive, highly sensitive and fast detection of even smallest concentrations of trace gases and molecules. During the past years, an increasing demand for mid-infrared (MIR) light sources suitable for, e.g. molecule or gas sensing applications, has driven the development and optimization of novel MIR lasers and light sources, such as quantum cascade lasers (QCL) or interband cascade lasers (ICL). Despite the progress on MIR light sources, there is still a lack in appropriate MIR detectors. Here, we present and discuss two promising and novel GaSb/InAs-based detector concepts. First, resonant tunneling diode (RTD) photodetectors as an alternative to avalanche photodetectors. In RTDs, amplification of photogenerated minority charge carriers is based on modulation of a majority charge carrier resonant tunneling current. Second, interband cascade photodetectors (ICD), in which a cascading scheme allows for fast carrier extraction and a compensation of the diffusion length limitation.

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Andreas Pfenning, Georg Knebl, Anne Schade, Robert Weih, Andreas Bader, Manuel Meyer, Sebastian Krüger, Florian Rothmayr, Caroline Kistner, Johannes Koeth, Martin Kamp, Fabian Hartmann, Lukas Worschech, and Sven Höfling "Mid-infrared detectors based on resonant tunneling diodes and interband cascade structures", Proc. SPIE 10765, Infrared Remote Sensing and Instrumentation XXVI, 107650U (18 September 2018); https://doi.org/10.1117/12.2324501

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