Superlattices: Progress and prospects

Creators: McGill, T. C.; Wu, G. Y.; Hetzler, S. R.

Abstract

The current status of HgTe–CdTe superlattices is reviewed. The properties predicted for the superlattices have been studied qualitatively in the cases where both theory and experiment exist. In particular, it has been found by both infrared absorption and photoluminescence that band gaps of the superlattices are substantially less than those of the alloy with the same average composition. Theoretical studies have concentrated on the factors (strain, band offsets, interdiffusion) that could result in substantial deviation of the properties of the superlattices from those predicted by the original simple theories. Some of the areas requiring further development are reviewed and discussed.

Additional Information

©1986 American Vacuum Society. (Received 15 December 1985; accepted 13 March 1986) The work at Caltech on HgTe-CdTe superlattices has been supported from the beginning by the Army Research Office, most recently under Contract No. DAAG 29-83-K-0104. One of us (TCM) has profited from discussions with a whole host of investigators in the field including: J. N. Schulman (Hughes Research Laboratories), D. L. Smith (Los Alamos Scientific Laboratories), J. O. McCaldin (Caltech), C. Mailhiot (Xerox), A. Hunter (Hughes Research Laboratories), J. Baukus (Hughes Research Laboratories), J. P. Faurie (University of Illinois at Chicago), P. Chow (Perkin Elmer), O. Marsh (Hughes Research Laboratories), C. Jones (Santa Barbara Research Center), M. Kinch (Texas Instruments), G. Roberts (Texas Instruments), and J. Ballingall (McDonnell Douglas).

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