Uncooled long-wavelength infrared photon detectors

Jozef Piotrowski; Antoni Rogalski

doi:10.1117/12.531402

6 July 2004 Uncooled long-wavelength infrared photon detectors

Jozef Piotrowski, Antoni Rogalski

Proceedings Volume 5359, Quantum Sensing and Nanophotonic Devices; (2004) https://doi.org/10.1117/12.531402
Event: Integrated Optoelectronic Devices 2004, 2004, San Jose, CA, United States

Abstract

At present, uncooled thermal detector focal plane arrays are successfully used in string thermal imagers. However, the performance of thermal detectors is modest, they suffer from slow response and they are not very useful in applications requiring multispectral detection. In the paper, a number of concepts to improve performance of photon detectors operating at room temperature are presented. Several types of detector materials are considered: HgCdTe, Sb-based III-V ternary alloys, and type-II InAs/GaSb superlattice. Initial efforts were concentrated on photoconductors and photoelectromagnetic detectors. Recently, advanced heterojunction photovoltaic detectors have been developed. It is shown that uncooled HgCdTe photovoltaic detector can achieve detectivity of 10⁹ cmHz^1/2W^-1 at the 8-9 μm range. Potentially the devices can be assembled in large focal plane arrays. This will enable obtaining of NEDT of less than 0.1 K for staring thermal imagers operating with f/1 optics and 30s^-1 frame rate.

Citation Download Citation

Jozef Piotrowski and Antoni Rogalski "Uncooled long-wavelength infrared photon detectors", Proc. SPIE 5359, Quantum Sensing and Nanophotonic Devices, (6 July 2004); https://doi.org/10.1117/12.531402

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