Non-Markovian dephasing of excitons in GaAs quantum wells

A. Iwamatsu, Y. Ogawa, Y. Mitsumori, F. Minami

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We measured time-resolved photon echo signals by using the heterodyne detection technique on GaAs multiple quantum wells. Oscillation structure with a period of about 0.8 ps is observed when the time interval (delay time) of two pulses which generate the photon echo signal is shorter than 0.4 ps. The oscillating structure disappears when the delay time is longer than 0.6 ps. Temperature and excitation density dependence indicate that the origin of this oscillation is the interaction between a normal exciton and an exciton coupled with a specific acoustic phonon mode which is identified by calculating the Rytov model.

Original languageEnglish
Pages (from-to)487-491
Number of pages5
JournalJournal of Luminescence
Volume119-120
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2006 Jul

Keywords

  • Four-wave mixing
  • GaAs quantum wells
  • Time-resolved spectroscopy

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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