Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 181909 |
| Fachzeitschrift | Applied physics letters |
| Jahrgang | 92 |
| Ausgabenummer | 18 |
| Publikationsstatus | Veröffentlicht - 16 Mai 2008 |
Abstract
Excitations of a single InAsAlAs self-assembled quantum dot were investigated by photoluminescence excitation spectroscopy. Resonant absorption by longitudinal-optical (LO) phonons of the quantum dot and the barriers is observed. In particular, a resonance at 41 meV is attributed to the AlAs-like mode of InAlAs with low Al content. Our results represent a direct optical measure of the intermixing (estimated below 10%) in a single quantum dot. They also demonstrate that all LO phonons of this mixed quantum dot system couple to the exciton states.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Physik und Astronomie (sonstige)
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in: Applied physics letters, Jahrgang 92, Nr. 18, 181909, 16.05.2008.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Resonant optical excitation of longitudinal-optical phonons and intermixing in InAsAlAs single quantum dots
AU - Sarkar, D.
AU - Van Der Meulen, H. P.
AU - Calleja, J. M.
AU - Meyer, J. M.
AU - Haug, R. J.
AU - Pierz, K.
N1 - Funding information: This work has been supported by research contracts of the Spanish Ministry of Education (MEC MAT2005-01388, NAN2004-09109-C04-04, TEC2004-05260-C02-02, Consolider CSD 2006-19) and the Community of Madrid (CAM S-0505-ESP-0200).
PY - 2008/5/16
Y1 - 2008/5/16
N2 - Excitations of a single InAsAlAs self-assembled quantum dot were investigated by photoluminescence excitation spectroscopy. Resonant absorption by longitudinal-optical (LO) phonons of the quantum dot and the barriers is observed. In particular, a resonance at 41 meV is attributed to the AlAs-like mode of InAlAs with low Al content. Our results represent a direct optical measure of the intermixing (estimated below 10%) in a single quantum dot. They also demonstrate that all LO phonons of this mixed quantum dot system couple to the exciton states.
AB - Excitations of a single InAsAlAs self-assembled quantum dot were investigated by photoluminescence excitation spectroscopy. Resonant absorption by longitudinal-optical (LO) phonons of the quantum dot and the barriers is observed. In particular, a resonance at 41 meV is attributed to the AlAs-like mode of InAlAs with low Al content. Our results represent a direct optical measure of the intermixing (estimated below 10%) in a single quantum dot. They also demonstrate that all LO phonons of this mixed quantum dot system couple to the exciton states.
UR - http://www.scopus.com/inward/record.url?scp=43349093094&partnerID=8YFLogxK
U2 - 10.1063/1.2920441
DO - 10.1063/1.2920441
M3 - Article
AN - SCOPUS:43349093094
VL - 92
JO - Applied physics letters
JF - Applied physics letters
SN - 0003-6951
IS - 18
M1 - 181909
ER -