Title of article
Study of phonons in self-assembled InAs quantum dots embedded in an InGaAlAs matrix
Author/Authors
Yukiko Kamikawa-Shimizu، نويسنده , , Robert Patterson، نويسنده , , Alexander Milekhin، نويسنده , , Kouichi Akahane، نويسنده , , Yasushi Shoji، نويسنده , , Dietrich R.T. Zahn *، نويسنده , , Yoshitaka Okada b، نويسنده , , Gavin Conibeer، نويسنده ,
Issue Information
ماهنامه با شماره پیاپی سال 2014
Pages
5
From page
1
To page
5
Abstract
We studied phonon modes propagating along the [3 1 1] direction in highly ordered, stacked InAs QDs embedded in an InGaAlAs matrix grown on InP(3 1 1) substrate by Raman spectroscopy. The Raman spectra showed clear doublets of folded quasi-longitudinal modes which have mixed transverse and longitudinal character. A broad feature observed in the Raman spectra was attributed to superposition of densely folded and/or confined phonon modes that is with agreement with our previous theoretical calculation. The phonon gap was observed and compared with our theoretical calculations.
Keywords
Sound velocity , Phonon gap , Self assembled QDs , Dispersion curve , Raman spectroscopy , Folded acoustic phonon
Journal title
Physica E Low-dimensional Systems and Nanostructures
Serial Year
2014
Journal title
Physica E Low-dimensional Systems and Nanostructures
Record number
1049495
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