Optical phonons as a probe to determine both composition and strain in In sub( x)Al sub( (1-x))As quantum dots embedded in an AlAs matrix

In...Al alpha ub (...) double prime s quantum dots (QD) embedded in an AlAs matrix were studied using Raman scattering and photoluminescence spectroscopy techniques. The longitudinal optical (LO) and transverse optical (TO) In-As bond vibrations frequencies are found to depend on both composition an...

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Bibliographic Details
Published in:Europhysics letters 2014-01, Vol.105 (1), p.1-1
Main Authors: Volodin, V A, Sinyukov, M P, Sachkov, V A, Stoffel, M, Rinnert, H, Vergnat, M
Format: Article
Language:English
Subjects:
Bonding
Mathematical analysis
Quantum dots
Raman scattering
Stoichiometry
Strain
Symbols
Vibration
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Summary:In...Al alpha ub (...) double prime s quantum dots (QD) embedded in an AlAs matrix were studied using Raman scattering and photoluminescence spectroscopy techniques. The longitudinal optical (LO) and transverse optical (TO) In-As bond vibrations frequencies are found to depend on both composition and strain. Using different scattering geometries (allowed for LO or for TO modes) the authors were able to obtain the experimental values of these frequencies. By comparing these values with the calculated frequencies, one can determine both the mean composition (stoichiometry parameter ...) and the biaxial strain in In...Al sub( (...))As QDs embedded in an AlAs matrix. Their approach is simple, non-destructive and fast. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0295-5075
1286-4854