Progress in InAs/InAsSb superlattice barrier infrared detectors

David Z. Ting; Anita M. Fisher; Brian J. Pepper; Cory J. Hill; Sam A. Keo; Arezou Khoshakhlagh; Alexander Soibel; Sir B. Rafol; Yuki Maruyama; Sarath D. Gunapala; Thomas S. Pagano

doi:10.1117/12.2618867

27 May 2022 Progress in InAs/InAsSb superlattice barrier infrared detectors

David Z. Ting, Anita M. Fisher, Brian J. Pepper, Cory J. Hill, Sam A. Keo, Arezou Khoshakhlagh, Alexander Soibel, Sir B. Rafol, Yuki Maruyama, Sarath D. Gunapala, Thomas S. Pagano

Author Affiliations +

Proceedings Volume 12107, Infrared Technology and Applications XLVIII; 121070O (2022) https://doi.org/10.1117/12.2618867
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States

Abstract

The InAs/InAsSb (Gallium-free) type-II strained-layer superlattice (T2SLS) has emerged in recent years as a viable infrared detector material. In particular, mid-wavelength InAs/InAsSb T2SLS focal plane array (FPA) based on the nBn detector architecture exhibits good operating characteristics at 160 K, demonstrating a considerably operating temperature advantage over InSb FPAs. In the long and very long cutoff wavelengths, InAs/InAsSb T2SLS detectors with n-type absorbers are limited in their attainable quantum efficiency (QE) due to short hole diffusion lengths and relatively modest absorption coefficients. We have explored long and very long wavelength InAs/InAsSb T2SLS complementary barrier infrared detectors (CBIRDs) that contain p-type absorber layers in order to take advantage of the longer electron diffusion length for QE enhancement. We also discuss recent development of the InAs/InAsSb T2SLS infrared detectors at the Jet Propulsion Laboratory for NASA Earth Science applications, including long-wavelength infrared FPAs for land imaging, and mid-wavelength infrared FPAs for CubeSat hyperspectral imaging.

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David Z. Ting, Anita M. Fisher, Brian J. Pepper, Cory J. Hill, Sam A. Keo, Arezou Khoshakhlagh, Alexander Soibel, Sir B. Rafol, Yuki Maruyama, Sarath D. Gunapala, and Thomas S. Pagano "Progress in InAs/InAsSb superlattice barrier infrared detectors", Proc. SPIE 12107, Infrared Technology and Applications XLVIII, 121070O (27 May 2022); https://doi.org/10.1117/12.2618867

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