The exponential optical absorption band tail of Hg1−xCdxTe
- 15 November 1984
- journal article
- conference paper
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 56 (10) , 2896-2900
- https://doi.org/10.1063/1.333828
Abstract
The optical absorption edges of Hg0.71Cd0.29Te and CdTe were measured over the temperature range 80≤T≤300 K. The refractive indices of these materials are determined over a large energy range at T=300 K and their dispersion relation is given. The absorption band tail of Hg1−xCdxTe has an exponential shape. Its slope increases with decreasing temperature. It is suggested that this tail is not caused by permanent lattice disorder but is a material property. An empirical expression for the absorption coefficient as a function of temperature and composition is derived. Using this expression, the zero‐intercept cut‐on energy of the infrared transmission spectrum at room temperature is used to define the composition for any desired thickness of Hg1−xCdxTe sample.This publication has 10 references indexed in Scilit:
- Energy gap versus alloy composition and temperature in Hg1−xCdxTeJournal of Applied Physics, 1982
- The Exponential Shape of the Optical Absorption Edge TailPhysica Status Solidi (b), 1981
- Infrared optical absorption of Hg1−xCdxTeJournal of Applied Physics, 1979
- Determination of temperature dependence of energy gap in HgTe by oscillatory magnetotransmission measurementsSolid State Communications, 1978
- Toward a Unified Theory of Urbach's Rule and Exponential Absorption EdgesPhysical Review B, 1972
- Energy Gap in Hg1−xCdxTe by Optical AbsorptionJournal of Applied Physics, 1969
- Optical Absorption Edge in CdTe: ExperimentalPhysical Review B, 1966
- Optical Absorption in HgTe and HgCdTePhysical Review B, 1964
- Conduction band minimum of CdTeJournal of Physics and Chemistry of Solids, 1964
- The Long-Wavelength Edge of Photographic Sensitivity and of the Electronic Absorption of SolidsPhysical Review B, 1953