Measurements of exciton-polariton dynamics in ZnO by using nonlinear spectroscopic techniques

K. Hazu, S. Adachi, T. Sota, S. F. Chichibu

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We have studied the exciton-polariton dynamics in a c-face bulk ZnO crystal grown by the seeded vapor transport method. We have performed two-pulse spectrally resolved four-wave mixing (SR-FWM) and three-pulse SR-FWM at T=10 K. In two-pulse FWM experiment, obtained FWM signals showed the fast dephasing which has been attributed to the strong polariton dispersion of the upper polariton of B exciton. On the other hand, in three-pulse FWM experiment, the signal decay shows the free exciton population relaxation. Observed FWM signal has decayed with time constant ∼12 ps which may represent exciton-polariton lifetime.

Original languageEnglish
Pages (from-to)7-10
Number of pages4
JournalJournal of Luminescence
Volume112
Issue number1
DOIs
Publication statusPublished - 2005 Apr 1

Keywords

  • Exciton
  • Four-wave mixing
  • Polariton
  • ZnO

ASJC Scopus subject areas

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

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