Huang PJ, Huang YS, Firszt F, Lęgowski S, Męczyńska H, Tiong KK. Optical characterization of a Cd(0.85)Mg(0.15)Se mixed crystal.
JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2007;
19:266002. [PMID:
21694071 DOI:
10.1088/0953-8984/19/26/266002]
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Abstract
We present an optical characterization of a Bridgman-grown wurtzite-type Cd(0.85)Mg(0.15)Se mixed crystal in the near-band-edge interband transitions using temperature-dependent contactless electroreflectance (CER) and photoreflectance (PR) in the temperature range 15-400 K. The interband excitonic transitions A and C originating from the band edge and spin-orbital splitting critical points of the sample, respectively, have been observed in the CER/PR spectra. The transition energies and broadening function of the excitonic features are determined via a lineshape fit to the CER/PR spectra. The parameters that describe the temperature dependence of the transition energies of excitons A and C, and the broadening function of exciton A, are evaluated and discussed.
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