Large-Format and Long-Wavelength Infrared Mercury Cadmium Telluride Detectors
Abstract
Due to continuous improvement of traditional liquid-phase epitaxy n-on- p technology, excellent mid-wavelength infrared HgCdTe (MCT) detectors with 1280 × 1024 pixels and 15 μm pitch size have been produced at AIM. At an operating temperature ( T OP) of 80 K, a noise equivalent temperature difference (NETD) of 17.8 mK and an operability of 99.96% have been obtained. At T OP = 130 K, the operability remains high at 99.58%. On the basis of these results, the sensitivity of this detector design has been extended into the long-wavelength infrared (LWIR) region, obtaining a detector with an NETD of 30.4 mK and an operability of 99.81% at T OP = 80 K. In parallel, the growing maturity of molecular-beam epitaxy (MBE) growth of MCT on GaAs substrates has led to an improvement of the performance of the MWIR 640 × 512, 15- μm-pitch detector from an operability of 99.30% in 2011 to 99.83% recently.
- Publication:
-
Journal of Electronic Materials
- Pub Date:
- November 2013
- DOI:
- 10.1007/s11664-013-2757-y
- Bibcode:
- 2013JEMat..42.3186W
- Keywords:
-
- Infrared detectors;
- HgCdTe;
- MCT;
- large format;
- LWIR;
- MBE