Abstract
We present a comparative analysis of Raman scattering by acoustic and optical phonons in InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces. Doublets of folded longitudinal acoustic phonons up to the fifth order were observed in the Raman spectra of (001)- and (311)B-oriented quantum dot superlattices measured in the polarized scattering geometries. The energy positions of the folded acoustic phonons are well described by the elastic continuum model. Besides the acoustic phonons, the spectra display features related to confined transverse and longitudinal optical as well as interface phonons in quantum dots and spacer layers. Their frequency positions are discussed in terms of phonon confinement, elastic stress, and atomic intermixing.
| Original language | English |
|---|---|
| Article number | 476 |
| Journal | Nanoscale Research Letters |
| Volume | 7 |
| DOIs | |
| Publication status | Published - 17 Sep 2012 |
| Externally published | Yes |
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Keywords
- Nanocrystals
- Nanoparticles
- Phonons
- Quantum dots
- Raman scattering spectroscopy
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
Cite this
Raman scattering of InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces. / Milekhin, Alexander; Yeryukov, Nikolay; Toropov, Alexander; Dmitriev, Dmitry; Sheremet, Evgeniya; Zahn, Dietrich R.T.
In: Nanoscale Research Letters, Vol. 7, 476, 17.09.2012.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Raman scattering of InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces
AU - Milekhin, Alexander
AU - Yeryukov, Nikolay
AU - Toropov, Alexander
AU - Dmitriev, Dmitry
AU - Sheremet, Evgeniya
AU - Zahn, Dietrich R.T.
PY - 2012/9/17
Y1 - 2012/9/17
N2 - We present a comparative analysis of Raman scattering by acoustic and optical phonons in InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces. Doublets of folded longitudinal acoustic phonons up to the fifth order were observed in the Raman spectra of (001)- and (311)B-oriented quantum dot superlattices measured in the polarized scattering geometries. The energy positions of the folded acoustic phonons are well described by the elastic continuum model. Besides the acoustic phonons, the spectra display features related to confined transverse and longitudinal optical as well as interface phonons in quantum dots and spacer layers. Their frequency positions are discussed in terms of phonon confinement, elastic stress, and atomic intermixing.
AB - We present a comparative analysis of Raman scattering by acoustic and optical phonons in InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces. Doublets of folded longitudinal acoustic phonons up to the fifth order were observed in the Raman spectra of (001)- and (311)B-oriented quantum dot superlattices measured in the polarized scattering geometries. The energy positions of the folded acoustic phonons are well described by the elastic continuum model. Besides the acoustic phonons, the spectra display features related to confined transverse and longitudinal optical as well as interface phonons in quantum dots and spacer layers. Their frequency positions are discussed in terms of phonon confinement, elastic stress, and atomic intermixing.
KW - Nanocrystals
KW - Nanoparticles
KW - Phonons
KW - Quantum dots
KW - Raman scattering spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=84866053938&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84866053938&partnerID=8YFLogxK
U2 - 10.1186/1556-276X-7-476
DO - 10.1186/1556-276X-7-476
M3 - Article
AN - SCOPUS:84866053938
VL - 7
JO - Nanoscale Research Letters
JF - Nanoscale Research Letters
SN - 1931-7573
M1 - 476
ER -