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Spectroscopic ellipsometry and photoluminescence investigation of Zn1-x-yBexMgySe and Cd1-x-yBexZnySe crystals

✍ Scribed by Wronkowska, A. A. ;Skowroński, Ł. ;Wronkowski, A. ;Firszt, F. ;Me¸czyńska, H. ;Łe¸gowski, S. ;Strzałkowski, K. ;Arwin, H.

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
588 KB
Volume
205
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

Optical and luminescence properties of the Bridgman‐grown Cd~1–x –y~ Be__~x~__ Zn__~y~__ Se and Zn~1–x –y~ Be__~x~__ Mg__~y~__ Se crystals are reported. Spectroscopic ellipsometry was employed for determination of spectral dependence of the complex dielectric function $ \tilde \epsilon $(E) in the photon energy range 0.75–6.5 eV. Below the absorption edge the refractive indices n (E) of the alloys were modelled using a Sellmeier‐type relation. The excitonic band‐gap energies were estimated from the ellipsometric and photoluminescence measurements. Compositional effects in the ellipsometric and photoluminescence spectra are discussed. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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