Abstract
We investigate the dephasing of excitons in InAs self-assembled quantum dots by using a transient four-wave-mixing technique. A used sample is specially designed to compensate the strain. We observe long-lived coherence of excitons at 5 K which corresponds to the dephasing time longer than a nanosecond, where the photon energy of the excitation pulse is 0.874 eV. We find that a pure dephasing due to exciton-phonon interactions dominates in the exciton dephasing rather than the population decay and the exciton-exciton interaction in the weak excitation region, by analyzing the population lifetime and the polarization-dependent dephasing time. quantum dot, strain compensation, dephasing, four-wave mixing, population lifetime, optical anisotropy.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 6115 |
| DOIs | |
| Publication status | Published - 2006 |
| Externally published | Yes |
| Event | Physics and Simulation of Optoelectronic Devices XIV - San Jose, CA, United States Duration: 2006 Jan 22 → 2006 Jan 26 |
Other
| Other | Physics and Simulation of Optoelectronic Devices XIV |
|---|---|
| Country | United States |
| City | San Jose, CA |
| Period | 06/1/22 → 06/1/26 |
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ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Condensed Matter Physics
Cite this
Exciton dephasing in strain-compensated self-assembled InAs quantum dots. / Hayase, Junko; Akahane, Kouichi; Yamamoto, Naokatsu; Kujiraoka, Mamiko; Ema, Kazuhiro; Sasaki, Masahide.
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6115 2006. 61151O.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Exciton dephasing in strain-compensated self-assembled InAs quantum dots
AU - Hayase, Junko
AU - Akahane, Kouichi
AU - Yamamoto, Naokatsu
AU - Kujiraoka, Mamiko
AU - Ema, Kazuhiro
AU - Sasaki, Masahide
PY - 2006
Y1 - 2006
N2 - We investigate the dephasing of excitons in InAs self-assembled quantum dots by using a transient four-wave-mixing technique. A used sample is specially designed to compensate the strain. We observe long-lived coherence of excitons at 5 K which corresponds to the dephasing time longer than a nanosecond, where the photon energy of the excitation pulse is 0.874 eV. We find that a pure dephasing due to exciton-phonon interactions dominates in the exciton dephasing rather than the population decay and the exciton-exciton interaction in the weak excitation region, by analyzing the population lifetime and the polarization-dependent dephasing time. quantum dot, strain compensation, dephasing, four-wave mixing, population lifetime, optical anisotropy.
AB - We investigate the dephasing of excitons in InAs self-assembled quantum dots by using a transient four-wave-mixing technique. A used sample is specially designed to compensate the strain. We observe long-lived coherence of excitons at 5 K which corresponds to the dephasing time longer than a nanosecond, where the photon energy of the excitation pulse is 0.874 eV. We find that a pure dephasing due to exciton-phonon interactions dominates in the exciton dephasing rather than the population decay and the exciton-exciton interaction in the weak excitation region, by analyzing the population lifetime and the polarization-dependent dephasing time. quantum dot, strain compensation, dephasing, four-wave mixing, population lifetime, optical anisotropy.
UR - http://www.scopus.com/inward/record.url?scp=33646578537&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33646578537&partnerID=8YFLogxK
U2 - 10.1117/12.661300
DO - 10.1117/12.661300
M3 - Conference contribution
AN - SCOPUS:33646578537
SN - 0819461571
SN - 9780819461575
VL - 6115
BT - Proceedings of SPIE - The International Society for Optical Engineering
ER -