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Proceedings Paper

Study of nature of lattice vibration variations depending on a spatial distribution of zinc over the depth of CdxHg1-xTe epitaxial layers grown on Cd1-yZnyTe substrates
Author(s): A. I. Belogorokhov; I. A. Denisov; N. A. Smirnova; A. A. Florentsev; N. V. Pashkova
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Paper Abstract

In this paper we report on the results of the study of optical properties of CdxHg1-xTe epitaxial layers (EL) grown by the LPE method on Cd1-xZnyTe substrates. The values of the band gap of the solid solution forming EL have been obtained from the optical absorption spectra (FTIR) taken in the spectral region of the interband absorption at step-by-step decrease of EL thickness as a result of a chemical etching. In bridge with it the distribution and character of variations in the intensity of lattice vibrations over the layer depth of CdxHg1-xTe / CdZnTe epitaxial structures was investigated. Longitudinal and transverse lattice vibration frequencies of CdxHg1-x-yZnyTe have been evaluated from the experimental spectra and compared with the theoretically calculated ones within a unit cell version of the random element isodisplacement model. From the comparing ofthe experimental and theoretical results it is possible to draw a conclusion that in immediate neighborhood of the CdxHg1-xTe/Cd1-yZnyTe interface the CdxHg1-x-yZnyTe thin layer is formed under the certain conditions during the EL growth process i.e., zinc atoms in given EL area is necessary to consider not as an impurity atoms but as the components of the cationic sublattice.

Paper Details

Date Published: 7 June 2005
PDF: 8 pages
Proc. SPIE 5834, 18th International Conference on Photoelectronics and Night Vision Devices, (7 June 2005); doi: 10.1117/12.628707
Show Author Affiliations
A. I. Belogorokhov, Institute of Rare Metals (Russia)
I. A. Denisov, Institute of Rare Metals (Russia)
N. A. Smirnova, Institute of Rare Metals (Russia)
A. A. Florentsev, Institute of Rare Metals (Russia)
N. V. Pashkova, Institute of Rare Metals (Russia)

Published in SPIE Proceedings Vol. 5834:
18th International Conference on Photoelectronics and Night Vision Devices
Anatoly M. Filachov; Vladimir P. Ponomarenko; Alexander I. Dirochka, Editor(s)

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