Influence of exciton-exciton interactions on frequency-mixing signals in a stable exciton-biexciton system

Junko Ishi, Hideyuki Kunugita, Kazuhiro Ema, Takuma Ban, Takashi Kondo

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Transient nondegenerate four-wave mixing was performed in the femtosecond domain on a stable exciton-biexciton system. For excitation with two spectrally narrow pulses of frequencies ω1 and ω2 that have no spectral overlap with each other, only a frequency-mixing signal at 2ω1−ω2 was observed. The polarization dependence of the frequency-mixing signal intensity changed dramatically with increasing frequency difference between the incident pulses. Our results demonstrate that the frequency-mixing signal is strongly correlated with the exciton dynamics and the dramatic change of its polarization dependence is caused by the exciton-exciton interactions.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number7
Publication statusPublished - 2001 Jan 22


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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