Near bandgap absorption and carrier transport in InAs/InAsSb superlattice devices

David R. Rhiger

doi:10.1117/12.3014943

7 June 2024 Near bandgap absorption and carrier transport in InAs/InAsSb superlattice devices

David R. Rhiger

Proceedings Volume 13046, Infrared Technology and Applications L; 130460O (2024) https://doi.org/10.1117/12.3014943
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States

Abstract

In mid-wavelength infrared detectors built with the InAs/InAsSb superlattice, a study of the absorption behavior near the cutoff wavelength was conducted. Two results are, first, an accurate method for determining the bandgap energy from the spectral response of a fabricated device, and second, an analysis of the Urbach tail of the absorption showing that its characteristic energy is consistent with the dominant phonon of InAs. Additionally, a temperature-dependent measurement of the transport of photo-generated holes in nBn devices can be used to identify the effects of localization due to layer nonuniformities, and to measure the energy step at hole-blocking features.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

David R. Rhiger "Near bandgap absorption and carrier transport in InAs/InAsSb superlattice devices", Proc. SPIE 13046, Infrared Technology and Applications L, 130460O (7 June 2024); https://doi.org/10.1117/12.3014943

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