Optical Constants of In1-xGaxSb Ternary Alloys: Experiment and Modeling
- 1 September 1993
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 32 (9R) , 3860-3865
- https://doi.org/10.1143/jjap.32.3860
Abstract
The optical response of In1-x Ga x Sb ternary alloys in the 1.5-5.4-eV photon-energy range at room temperature is measured by spectroscopic ellipsometry (SE). The measured SE data show distinct structures at energies of the E 1, E 1+Δ1, E 0 ′, E 0 ′+Δ0 ′, E 2 and E 1 ′ critical points. These spectra are analyzed on the basis of a simplified model of interband transitions. The model proposed here enables us to obtain the optical response in In1-x Ga x Sb alloys of arbitrary composition (x) and photon energy (E=\hbarω). Results of the surface-treatment effect on the pseudodielectric functions are also presented.Keywords
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