Enhancement of nonlinear optical response of weakly confined excitons in GaAs thin films by spectrally rectangle-shape-pulse-excitation

O. Kojima, T. Isu, Junko Hayase, M. Sasaki, M. Tsuchiya

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We report the enhancement of the nonlinear optical response of the weakly confined excitons with use of spectrally rectangular pulse. The nonlinear optical response was investigated as a function of excitation energy by a degenerate four-wave-mixing (DFWM) technique. In the case that the laser pulse with the controlled spectral shape excites the plural exciton states simultaneously, the DFWM signal intensity is enhanced by a factor of two in comparison with the intensity under the excitation of a single exciton state. This enhancement is caused by the superposition of the nonlinear optical responses from the plural exciton states.

Original languageEnglish
Article number124
Pages (from-to)618-622
Number of pages5
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2007 Apr 1
Externally publishedYes


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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