Spectral width dependence of residual carrier effect on nonlinear optical response of weakly confined excitons

O. Kojima, T. Isu, J. Ishi-Hayase, M. Sasaki, A. Kanno, R. Katouf, M. Tsuchiya

Research output: Contribution to journalConference article

8 Citations (Scopus)


We report residual carrier effects on the nonlinear optical response of weakly confined excitons in GaAs thin films. The nonlinear response was investigated using a degenerate four-wave mixing technique with an additional pulse to create the residual carriers. In the case of the additional-pulse incidence, the signal intensity decreases with the time of incidence. However, the ultrafast component comparable to the pulse width in the temporal profiles does not change appreciably. Our results imply the possibility of the realization of ultrafast switching using the exciton response.

Original languageEnglish
Pages (from-to)2858-2860
Number of pages3
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Issue number9
Publication statusPublished - 2008 Dec 1
Externally publishedYes
Event34th International Symposium on Compound Semiconductors, ISCS-2007 - Kyoto, Japan
Duration: 2007 Oct 152007 Oct 18


ASJC Scopus subject areas

  • Condensed Matter Physics

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