TY - JOUR
T1 - Effect of the depolarization field on coherent optical properties in semiconductor quantum dots
AU - Mitsumori, Yasuyoshi
AU - Watanabe, Shunta
AU - Asakura, Kenta
AU - Seki, Keisuke
AU - Edamatsu, Keiichi
AU - Akahane, Kouichi
AU - Yamamoto, Naokatsu
N1 - Funding Information:
This paper was supported in part by Japan Society for the Promotion of Science KAKENHI Grants No. JP20740168 and No. JP23340083. We are grateful to A. Oiwa of Osaka University for the fabrication of the aperture on the sample. We thank Y. Ogawa of Joetsu University of Education, M. Sadgrove of Tohoku University, H. Ajiki of Tokyo Denki University, and M. Bamba of Osaka University for helpful discussions. Y.M. acknowledges support from the M. Ishida foundation.
Publisher Copyright:
© 2018 American Physical Society.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2018/6/6
Y1 - 2018/6/6
N2 - We study the photon echo spectrum of self-assembled semiconductor quantum dots using femtosecond light pulses. The spectrum shape changes from a single-peaked to a double-peaked structure as the time delay between the two excitation pulses is increased. The spectrum change is reproduced by numerical calculations, which include the depolarization field induced by the biexciton-exciton transition as well as the conventional local-field effect for the exciton-ground-state transition in a quantum dot. Our findings suggest that various optical transitions in tightly localized systems generate a depolarization field, which renormalizes the resonant frequency with a change in the polarization itself, leading to unique optical properties.
AB - We study the photon echo spectrum of self-assembled semiconductor quantum dots using femtosecond light pulses. The spectrum shape changes from a single-peaked to a double-peaked structure as the time delay between the two excitation pulses is increased. The spectrum change is reproduced by numerical calculations, which include the depolarization field induced by the biexciton-exciton transition as well as the conventional local-field effect for the exciton-ground-state transition in a quantum dot. Our findings suggest that various optical transitions in tightly localized systems generate a depolarization field, which renormalizes the resonant frequency with a change in the polarization itself, leading to unique optical properties.
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U2 - 10.1103/PhysRevB.97.235305
DO - 10.1103/PhysRevB.97.235305
M3 - Article
AN - SCOPUS:85048368432
VL - 97
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 23
M1 - 235305
ER -