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Proceedings Paper

Molecular beam epitaxial growth and optical properties of (001) HgTe/Hg1-xCdxTe superlattices
Author(s): Charles R. Becker; V. Latussek; Wolfgang Spahn; F. Goschenhofer; S. Oehling; Gottfried Landwehr
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Paper Abstract

The experimental optical absorption coefficient of HgTe/Hg0.32Cd0.68Te superlattices with a wide range of well and barrier widths have been compared with theoretical calculations. There is good agreement with experiment if the Cd concentration profile across the as-grown interfaces is assumed to have the shape given by an error function together with an additional Cd concentration of 3% in the quantum wells. The latter concentration was experimentally confirmed. If diffusion is responsible for this concentration profile then a dependence on depth should be present, however, none was observed. Therefore the Cd concentration profile across the interfaces of an as-grown HgTe/Hg0.32Cd0.68Te superlattice does not result from interdiffusion of the interfaces during growth. In other words, growth mechanisms do not involve interdiffusion of the interfaces.

Paper Details

Date Published: 1 September 1995
PDF: 9 pages
Proc. SPIE 2554, Growth and Characterization of Materials for Infrared Detectors II, (1 September 1995); doi: 10.1117/12.218176
Show Author Affiliations
Charles R. Becker, Physikalisches Institut der Univ. Wuerzburg (Germany)
V. Latussek, Physikalisches Institut der Univ. Wuerzburg (Germany)
Wolfgang Spahn, Physikalisches Institut der Univ. Wuerzburg (Germany)
F. Goschenhofer, Physikalisches Institut der Univ. Wuerzburg (Germany)
S. Oehling, Physikalisches Institut der Univ. Wuerzburg (Germany)
Gottfried Landwehr, Physikalisches Institut der Univ. Wuerzburg (Germany)


Published in SPIE Proceedings Vol. 2554:
Growth and Characterization of Materials for Infrared Detectors II
Randolph E. Longshore; Jan W. Baars; Avishai Kepten; John M. Trombetta, Editor(s)

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