Two-photon echo method to determine the transverse relaxation time of excitonic molecules

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2 Citations (Scopus)

Abstract

A nonlinear optical method to determine the transverse relaxation time of excitonic molecules by means of two-photon echo is proposed. In the case of two-photon transition such as excitonic molecule one needs three pulses to obtain an echo signal. When the wave-vector and frequency of the three successive pulses are denoted by k11, k22 and k33, the two-photon echo can be observed in the direction of 4k2-2k1-k3 with frequency 4ω2-2ω13. Tuning both ω1 and ω2 to be two-photon resonant with excitonic molecule, we can satisfy the phase-matching condition rather easily for appropriate values of ω3 due to the large dispersion of excitonic polaritons. From the correlation trace of the two-photon echo we can determine directly the transverse relaxation time of excitonic molecules.

Original languageEnglish
Pages (from-to)179-182
Number of pages4
JournalSolid State Communications
Volume38
Issue number3
DOIs
Publication statusPublished - 1981 Apr
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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