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

研究成果: Article

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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.

元の言語English
ページ(範囲)179-182
ページ数4
ジャーナルSolid State Communications
38
発行部数3
DOI
出版物ステータスPublished - 1981 4
外部発表Yes

ASJC Scopus subject areas

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

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