Optical Kerr response to multi pump pulses on GaAs weakly confined exciton

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 optical Kerr response under two-pump pulse irradiation induced by GaAs weakly confined exciton. Ultrafast response times of the order of picoseconds are observed despite long exciton lifetime of the order of nanoseconds. The difference may be attributed to the relaxation mechanisms between population relaxation and nonlinear relaxation of excitons. In addition, the observed temporal shapes of the optical Kerr response are conserved under irradiation by a preceding pulse that forms the exciton population. The pulse separation of the optical Kerr response between two pump pulses is achieved to be 800 fs, which corresponds to a signal train of 1.25 Tbits per second.

Original languageEnglish
Pages (from-to)1509-1512
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Issue number6
Publication statusPublished - 2009 Sept 30
Externally publishedYes
Event35th International Symposium on Compound Semiconductors, ISCS 2008 - Rust, Germany
Duration: 2008 Sept 212008 Sept 24

ASJC Scopus subject areas

  • Condensed Matter Physics


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