Giant-Oscillator-Strength Effect on Excitonic Optical Nonlinearities Due to Localization

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The optical nonlinearity (3) of excitons localized by disorder or impurity has a large value as a consequence of the double multiplication of the giant oscillator strength due to exciton localization because the (3) process involves the double repetition of the excitonic transition. The importance of the exciton correlation in the coherent nonlinear optical process is pointed out for the first time. The sign of (3) relative to (1) gives important information about the character of the exciton correlation.

Original languageEnglish
Pages (from-to)2533-2536
Number of pages4
JournalPhysical Review Letters
Issue number23
Publication statusPublished - 1986
Externally publishedYes


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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