Effect of the depolarization field on coherent optical properties in semiconductor quantum dots

Yasuyoshi Mitsumori, Shunta Watanabe, Kenta Asakura, Keisuke Seki, Keiichi Edamatsu, Kouichi Akahane, Naokatsu Yamamoto

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number235305
JournalPhysical Review B
Volume97
Issue number23
DOIs
Publication statusPublished - 2018 Jun 6

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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