| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7934503 | Physica E: Low-dimensional Systems and Nanostructures | 2014 | 5 Pages |
Abstract
We studied phonon modes propagating along the [3Â 1Â 1] direction in highly ordered, stacked InAs QDs embedded in an InGaAlAs matrix grown on InP(3Â 1Â 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.
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Materials Science
Electronic, Optical and Magnetic Materials
Authors
Yukiko Kamikawa-Shimizu, Robert Patterson, Alexander Milekhin, Kouichi Akahane, Yasushi Shoji, Dietrich R.T. Zahn, Yoshitaka Okada, Gavin Conibeer,