Optimization of MWIR type-II superlattices for infrared detection

C. Grein; M. E. Flatté

doi:10.1117/12.851862

3 May 2010 Optimization of MWIR type-II superlattices for infrared detection

C. Grein, M. E. Flatté

Proceedings Volume 7660, Infrared Technology and Applications XXXVI; 76601L (2010) https://doi.org/10.1117/12.851862
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

Type II superlattices (SLs) offer a broad range of design degrees of freedom to help optimize their properties for infrared detection. Under the AFRL STEPS contract, we focus on mid-wavelength infrared (MWIR; 2-5 μm bandpass) Type II structures with two-layer InAs/GaInSb and four-layer "W-structure" InAs/GaInSb/InAs/AlInGaAsSb SL periods. We consider details of the electronic band structures that reduce Auger recombination rates in p-type SLs specifically by affecting the density of final states available to one of the involved carriers. This work assesses the potential impact of final state optimizations on 5 μm band gap SLs in the 200-225 K operating temperature range.

Citation Download Citation

C. Grein and M. E. Flatté "Optimization of MWIR type-II superlattices for infrared detection", Proc. SPIE 7660, Infrared Technology and Applications XXXVI, 76601L (3 May 2010); https://doi.org/10.1117/12.851862

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