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27 January 2017Extended cut-off wavelength nBn detector utilizing InAsSb/InSb digital alloy absorber
We investigated a novel approach to extend a cut-off wavelength of Sb-based nBn detectors. We incorporated a series of single InSb monolayer into InAsSb bulk that allowed to realize a digital alloy absorber with an extended cut-off wavelength of λ = 4.6 μm at T = 200 K. The cut-off wavelength extension to 4.6μm is technologically important for realization of detectors covering CO2 absorption line at 4.26μm.
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A. Soibel, D. Z. Ting, C. J. Hill, Anita M. Fisher, Linda Hoglund, Sam A. Keo, Sarath D. Gunapala, "Extended cut-off wavelength nBn detector utilizing InAsSb/InSb digital alloy absorber," Proc. SPIE 10111, Quantum Sensing and Nano Electronics and Photonics XIV, 1011114 (27 January 2017); https://doi.org/10.1117/12.2251703