Short to long-wave IR detectors based on InAs/GaSb superlattices in multi-color application

Jie Guo; Guowei Wang; Xu Lin; Ruiting Hao

doi:10.1117/12.2031647

11 September 2013 Short to long-wave IR detectors based on InAs/GaSb superlattices in multi-color application

Jie Guo, Guowei Wang, Xu Lin, Ruiting Hao

Proceedings Volume 8907, International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications; 89070R (2013) https://doi.org/10.1117/12.2031647
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

Recently excellent infrared detectors have been demonstrated using InAs/GaSb superlattice materials sensitive at wavelength from 3um to greater than 32um. Using empirical tight binding method (ETBM), different structures as InAs(xML)/GaSb(8ML), (x=2, 4, 6, 8) and InAs(14ML)/GaSb(7ML) were designed for various cut-off wavelengths from short to long IR wavelength. These materials were grown by MBE with valved cracker cells for arsenic and antimony on p-type GaSb(001) substrates. The microstructure and the bandgap Eg were verified by high resolution X-ray diffraction and photoresponse spectra. The temperature dependence of Eg and photoresponse responsivity Rv were studied. The differential resistance under zero bias R₀ in MWIR photodiode was measured up to 10⁶ ohms. The ideality factor in the range of 1.5 to 2.1 indicates the generation-recombination current and surface leakage current are the dominant leakage in the depletion region. These results will promote InAs/GaSb superlattices infrared detectors research in multi-color from short to long wave IR application.

Citation Download Citation

Jie Guo, Guowei Wang, Xu Lin, and Ruiting Hao "Short to long-wave IR detectors based on InAs/GaSb superlattices in multi-color application", Proc. SPIE 8907, International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications, 89070R (11 September 2013); https://doi.org/10.1117/12.2031647

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