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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

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
Volume61
Issue number1
DOIs
Publication statusPublished - 2007 Apr 1
Externally publishedYes

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rectangles
excitons
augmentation
thin films
pulses
four-wave mixing
excitation
lasers
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Enhancement of nonlinear optical response of weakly confined excitons in GaAs thin films by spectrally rectangle-shape-pulse-excitation. / Kojima, O.; Isu, T.; Hayase, Junko; Sasaki, M.; Tsuchiya, M.

In: Journal of Physics: Conference Series, Vol. 61, No. 1, 124, 01.04.2007, p. 618-622.

Research output: Contribution to journalArticle

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