Translator Disclaimer
28 February 2006 Single- and two-color HgTe/CdTe superlattice based infrared detectors
Author Affiliations +
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.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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); doi: 10.1117/12.640090;

Back to Top