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Influence of the buffer layer on the FIR reflectivity spectra of a thick superlattice

✍ Scribed by Z. Ristovski; P.M. Nikolić; D. Siapkas; T.T. Zorba; M. Henini

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
237 KB
Volume
21
Category
Article
ISSN
0749-6036

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✦ Synopsis

Infrared reflectivity spectra of GaAs/AlGaAs thick multiple heterostructures in the far-infrared range up to 450 cm\ have been investigated. A big influence of the buffer layer in the transparency region between the two 'Reststrahlen' bands, of GaAs and AlAs, is observed. It was shown that a simple analysis of experimental data with an iterative method, performed in the effective medium approximation, allows a very accurate determination of the structural parameters not only of the superlattice but also of the buffer layer.

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