Ultrafast optical Kerr effect of excitons weakly confined in GaAs thin films

Atsushi Kanno, Redouane Katouf, Osamu Kojima, Junko Ishi-Hayase, Masahiro Tsuchiya, Toshiro Isu

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


We investigate ultrafast response of optical Kerr effect (OKE) induced by excitons weakly confined in GaAs thin films. The observed decay time of optical response agrees approximately with incident pulse duration. At 100-fs pulse irradiation the response time is estimated to be 170 fs, though the exciton lifetime is about 10 ns. It is considered that the ultrafast response of OKE is caused by not population relaxation but orientation relaxation of excitons.

Original languageEnglish
Pages (from-to)360-363
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Issue number1
Publication statusPublished - 2008 Jun 30
Externally publishedYes
Event15th International Conference on Nonequilibrium Carrier Dynamics in Semiconductors, HCIS15 - Tokyo, Japan
Duration: 2007 Jul 232007 Jul 27

ASJC Scopus subject areas

  • Condensed Matter Physics


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