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Raman scattering of InSb quantum dots grown on InP substrates

AuthorsArmelles Reig, Gaspar ; Utzmeier, T.; Postigo, Pablo Aitor ; Briones Fernández-Pola, Fernando ; Ferrer, Juan Carlos; Peiró, P.; Cornet, A.
KeywordsIndium compounds
III-V semiconductors
Raman spectra
Semiconductor quantum dots
Issue Date1-May-1997
PublisherAmerican Institute of Physics
CitationJournal of Applied Physics 81(9): 6339 (1997)
AbstractIn this paper we present the Raman scattering of self-assembled InSb dots grown on (001) oriented InP substrates. The samples were grown by pulsed molecular beam epitaxy mode. Two types of samples have been investigated. In one type the InSb dots were capped with 200 monolayers of InP; in the other type no capping was deposited after the InSb dot formation. We observe two peaks in the Raman spectra of the uncapped dot, while only one peak is observed in the Raman spectra of the capped dots. In the case of the uncapped dots the peaks are attributed to LO-like and TO-like vibration of completely relaxed InSb dots, in agreement with high resolution transmission electron microscopy photographs. The Raman spectra of the capped dot suggest a different strain state in the dot due to the capping layer.
Description4 pages, 4 figures.-- PACS: 78.30.Fs; 78.66.Fd; 68.65.+g; 68.35.Ja
Publisher version (URL)http://dx.doi.org/10.1063/1.365169
Appears in Collections:(IMN-CNM) Artículos
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