Large Optical Nonlinearity Due to Exciton State in PbI2

Teruya Ishihara, Takenari Goto

研究成果: Article査読

11 被引用数 (Scopus)


Optical nonlinearity is studied in a PbI2 evaporated film under the pump and probe configuration using two tunable nanosecond pulsed lasers. A change of the transmitted probe intensity is observed when the pump frequency is equal to the probe one and is in the exciton region. This Rayleigh-type nonlinearity is neither due to hole burning effect nor thermal grating effect, but due to excitonic population oscillation. The maximum nonlinear absorption amounts to —2 × 105 cm/MW which corresponds to a third-order nonlinear susceptibility of —10–4 esu. Such a large nonlinearity can be explained if the nonlinear interaction takes place over many unit cells, which comes from coherent expanse of an exciton in the crystal.

ジャーナルjournal of the physical society of japan
出版ステータスPublished - 1988

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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