HgTe-CdTe superlattices for infrared detection revisited

Details HgTe-CdTe superlattices for infrared detection revisited HgTe-CdTe superlattices for infrared detection revisited

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apphl..61.1814m&link_type=abstract

Applied Physics Letters (ISSN 0003-6951), vol. 61, no. 15, p. 1814-1816.

Physics

8

Cadmium Tellurides, Electron Tunneling, Infrared Detectors, Mercury Tellurides, Optical Materials, Superlattices, Energy Gaps (Solid State), Mercury Cadmium Tellurides, Molecular Beam Epitaxy

Scientific paper

Selected properties of HgTe-CdTe superlattices are re-examined in light of the new consensus that the valence-band offset is large. We conclude that while the cutoff wavelength for infrared detectors remains easier to control in superlattices than in the corresponding Hg(1-x)Cd(x)Te alloy, the advantage is less than was predicted earlier assuming a small offset. The reduction of tunneling noise and minority carrier efficiency are discussed on the basis of revised electron and hole masses in the growth direction.

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