Abstract
We report a demonstration of very long wavelength infrared detectors based on InAs/GaSb superlattices operating at T=80 K. Detector structures with excellent material quality were grown on an optimized GaSb buffer layer on GaAs semi-insulating substrates. Photoconductive devices with 50% cutoff wavelength of λc= 17 μm showed a peak responsivity of about 100 mA/W at T=80 K. Devices with 50% cutoff wavelengths up to λc=22 μm were demonstrated at this temperature. Good uniformity was obtained over large areas even for the devices with very long cutoff wavelengths.
Original language | English (US) |
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Pages (from-to) | 1572-1574 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 77 |
Issue number | 11 |
DOIs | |
State | Published - Sep 11 2000 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)