Details
| Original language | English |
|---|---|
| Article number | 081302 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 71 |
| Issue number | 8 |
| Publication status | Published - 8 Feb 2005 |
Abstract
Photoluminescence emission spectra of self-assembled single InAs/AlAs quantum dots with variable size reveal typical sharp lines below 1.8 eV, corresponding to transitions between fully confined states. Above this energy the sharp peaks disappear due to the Γ-X scattering of conduction electrons. Excitation spectra of the biexciton line in single quantum dots show marked maxima at the optical-phonon frequency of the quantum dot and at its first overtone. The quantum dot phonon energy observed is 31 meV. Our results indicate an efficient polaron coupling in these quantum dots.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physical Review B - Condensed Matter and Materials Physics, Vol. 71, No. 8, 081302, 08.02.2005.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Phonons in InAs/AlAs single quantum dots observed by optical emission
AU - Sarkar, D.
AU - Van Der Meulen, H. P.
AU - Calleja, J. M.
AU - Becker, J. M.
AU - Haug, R. J.
AU - Pierz, K.
PY - 2005/2/8
Y1 - 2005/2/8
N2 - Photoluminescence emission spectra of self-assembled single InAs/AlAs quantum dots with variable size reveal typical sharp lines below 1.8 eV, corresponding to transitions between fully confined states. Above this energy the sharp peaks disappear due to the Γ-X scattering of conduction electrons. Excitation spectra of the biexciton line in single quantum dots show marked maxima at the optical-phonon frequency of the quantum dot and at its first overtone. The quantum dot phonon energy observed is 31 meV. Our results indicate an efficient polaron coupling in these quantum dots.
AB - Photoluminescence emission spectra of self-assembled single InAs/AlAs quantum dots with variable size reveal typical sharp lines below 1.8 eV, corresponding to transitions between fully confined states. Above this energy the sharp peaks disappear due to the Γ-X scattering of conduction electrons. Excitation spectra of the biexciton line in single quantum dots show marked maxima at the optical-phonon frequency of the quantum dot and at its first overtone. The quantum dot phonon energy observed is 31 meV. Our results indicate an efficient polaron coupling in these quantum dots.
UR - http://www.scopus.com/inward/record.url?scp=16344384405&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.71.081302
DO - 10.1103/PhysRevB.71.081302
M3 - Article
AN - SCOPUS:16344384405
VL - 71
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 1098-0121
IS - 8
M1 - 081302
ER -