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Proceedings Paper

Recent advances in high-performance antimonide-based superlattice FPAs
Author(s): M. Razeghi; E. K. Huang; B.-M. Nguyen; S. Ramezani-Darvish; S. Abdollahi Pour; G. Chen; A. Haddadi; M.-A. Hoang
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Paper Abstract

Infrared detection technologies entering the third generation demand performances for higher detectivity, higher operating temperature, higher resolution and multi-color detection, all accomplished with better yield and lower manufacturing/operating costs. Type-II antimonide based superlattices (T2SL) are making firm steps toward the new era of focal plane array imaging as witnessed in the unique advantages and significant progress achieved in recent years. In this talk, we will present the four research themes towards third generation imagers based on T2SL at the Center for Quantum Devices. High performance LWIR megapixel focal plane arrays (FPAs) are demonstrated at 80K with an NEDT of 23.6mK using f/2 optics, an integration time of 0.13ms and a 300K background. MWIR and LWIR FPAs on non-native GaAs substrates are demonstrated as a proof of concept for the cost reduction and mass production of this technology. In the MWIR regime, progress has been made to elevate the operating temperature of the device, in order to avoid the burden of liquid nitrogen cooling. We have demonstrated a quantum efficiency above 50%, and a specific detectivity of 1.05x1012 cm.Hz1/2/W at 150K for 4.2μm cut-off single element devices. Progress on LWIR/LWIR dual color FPAs as well as novel approaches for FPA fabrication will also be discussed.

Paper Details

Date Published: 20 May 2011
PDF: 13 pages
Proc. SPIE 8012, Infrared Technology and Applications XXXVII, 80120T (20 May 2011); doi: 10.1117/12.887597
Show Author Affiliations
M. Razeghi, Northwestern Univ. (United States)
E. K. Huang, Northwestern Univ. (United States)
B.-M. Nguyen, Northwestern Univ. (United States)
S. Ramezani-Darvish, Northwestern Univ. (United States)
S. Abdollahi Pour, Northwestern Univ. (United States)
G. Chen, Northwestern Univ. (United States)
A. Haddadi, Northwestern Univ. (United States)
M.-A. Hoang, Northwestern Univ. (United States)

Published in SPIE Proceedings Vol. 8012:
Infrared Technology and Applications XXXVII
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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