Single- and two-color HgTe/CdTe superlattice based infrared detectors

C. H. Grein; P. Boieriu; M. E. Flatté

doi:10.1117/12.640090

28 February 2006 Single- and two-color HgTe/CdTe superlattice based infrared detectors

C. H. Grein, P. Boieriu, M. E. Flatté

Proceedings Volume 6127, Quantum Sensing and Nanophotonic Devices III; 61270W (2006) https://doi.org/10.1117/12.640090
Event: Integrated Optoelectronic Devices 2006, 2006, San Jose, California, United States

Abstract

The optimal performance of HgTe/CdTe superlattice-based LWIR (8-12 μm cutoff wavelengths) and VLWIR (greater than 12um cutoff wavelength) photovoltaic detectors is assessed theoretically. The electronic band structures and optical absorption spectra are computed with a fourteen-band restricted-basis envelope function Hamiltonian. Auger and radiative lifetimes are computed with these accurate band structures. Vertical carrier mobilities are obtained from a Monte Carlo transport methodology. Photon detectors are modeled by solving current continuity and Poisson's equations. Predictions are compared with those for HgCdTe-alloy based detectors. We find that the superlattice-based two-color detector promise sharp rises in quantum efficiencies near the cutoff wavelengths, reflecting the quasi-2-dimensional nature of their density of states.

Citation Download Citation

C. H. Grein, P. Boieriu, and M. E. Flatté "Single- and two-color HgTe/CdTe superlattice based infrared detectors", Proc. SPIE 6127, Quantum Sensing and Nanophotonic Devices III, 61270W (28 February 2006); https://doi.org/10.1117/12.640090

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