Enhancement of quantum efficiency via tuning electric-field distribution for long-wavelength infrared InAs/GaSb type-II superlattice detectors

Quankui Yang; Raphael Müller; Mark Wobrock; Wolfgang Luppold; Volker Daumer; Robert Rehm

doi:10.1117/12.3013274

10 June 2024 Enhancement of quantum efficiency via tuning electric-field distribution for long-wavelength infrared InAs/GaSb type-II superlattice detectors

Quankui Yang, Raphael Müller, Mark Wobrock, Wolfgang Luppold, Volker Daumer, Robert Rehm

Author Affiliations +

Proceedings Volume 13046, Infrared Technology and Applications L; 130460G (2024) https://doi.org/10.1117/12.3013274
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States

Abstract

In this contribution, we will present a finite element method modelling study for the optimization of QE in LWIR InAs/GaSb type-II superlattice detectors via the employment of metastructures. Experiments to realize these devices will also be presented. In our approach, the average integrated QE for a structure with an absorber thickness of 2.1 µm is theoretically improved from 35% to 73%, corresponding to an improvement of 108%. For a detector with a thin absorber layer of 0.9 µm, the average integrated QE is improved from 21% to 59%, corresponding to an increasement of 180%.

Conference Presentation

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Quankui Yang, Raphael Müller, Mark Wobrock, Wolfgang Luppold, Volker Daumer, and Robert Rehm "Enhancement of quantum efficiency via tuning electric-field distribution for long-wavelength infrared InAs/GaSb type-II superlattice detectors", Proc. SPIE 13046, Infrared Technology and Applications L, 130460G (10 June 2024); https://doi.org/10.1117/12.3013274

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