THALES long-wave advanced IR QWIP cameras
THALES have developed for volume manufacture two high performance low cost thermal imaging cameras based on the THALES Research & Technology (TRT) 3rd generation gallium arsenide long wave Quantum...
Long-wavelength infrared (LWIR) quantum-dot infrared photodetector (QDIP) focal plane array
We have exploited the artificial atomlike properties of epitaxially self-assembled quantum dots for the development of high operating temperature long wavelength infrared (LWIR) focal plane arrays. Qu...
Quantum-dot infrared photodetectors and focal plane arrays
Proc. SPIE, Vol. 6206, 62060I (2006);
doi:10.1117/12.661175
Online Publication Date: 17 May 2006
Conference Date: Monday 17 April 2006
Conference Location: Orlando (Kissimmee), FL, USA
Conference Title: Infrared Technology and Applications XXXII
Conference Chairs: Bjørn F. Andresen, Gabor F. Fulop, Paul R. Norton
We reportour recent results about mid-wavelength infrared quantum-dot infrared photodetectors (QDIPs)grown by low-pressure metalorganic chemical vapor deposition. A very highresponsivity and a very low dark current were obtained. Ahigh peak detectivity of the order of 3×1012 Jones wasachieved at 77 K. The temperature dependent device performance wasalso investigated. The improved temperature insensitivity compared to QWIPs wasattributed to the properties of quantum dots. The device showeda background limited performance temperature of 220 K with a45° field of view and 300K background. The current deviceproblems are a low quantum efficiency and a stronger thanexpected performance degradation as a function of operating temperature. Possibleways to improve the quantum efficiency and operating temperature arediscussed.
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