TY - GEN
T1 - Exciton dephasing in strain-compensated self-assembled InAs quantum dots
AU - Ishi-Hayase, Junko
AU - Akahane, Kouichi
AU - Yamamoto, Naokatsu
AU - Kujiraoka, Mamiko
AU - Ema, Kazuhiro
AU - Sasaki, Masahide
PY - 2006/5/22
Y1 - 2006/5/22
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
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Physics and Simulation of Optoelectronic Devices XIV
T2 - Physics and Simulation of Optoelectronic Devices XIV
Y2 - 22 January 2006 through 26 January 2006
ER -