Theory of dephasing relaxation of excitonic polaritons

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Abstract

A detailed theory is developed for the dephasing relaxation of the excitonic polariton which was measured recently by Masumoto, Shionoya, and Takagahara [Phys. Rev. Lett. 51, 923 (1983)] in samples of CuCl crystal by means of nondegenerate four-wave mixing. The concept of dephasing (transverse) relaxation of the excitonic polariton is clarified for the first time and the conceptual difference between the dephasing relaxation of the localized excitation and of the excitonic polariton is emphasized. A method of analysis of the experimental data of the nondegenerate four-wave mixing is presented in detail. The various mechanisms of dephasing relaxation of the excitonic polariton are discussed and examined quantitatively. It is found that the mutual collision among excitonic polaritons is the most probable mechanism that gives the correct order of magnitude of the dephasing relaxation rate and leads to reasonable energy dependence of the relaxation rate in agreement with the experimental results.

Original languageEnglish
Pages (from-to)8171-8187
Number of pages17
JournalPhysical Review B
Volume31
Issue number12
DOIs
Publication statusPublished - 1985
Externally publishedYes

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Four wave mixing
polaritons
four-wave mixing
Crystals
collisions
excitation
crystals

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Theory of dephasing relaxation of excitonic polaritons. / Takagahara, Toshihide.

In: Physical Review B, Vol. 31, No. 12, 1985, p. 8171-8187.

Research output: Contribution to journalArticle

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