Giant nonlinear phase shift at exciton resonance in ZnSe

T. Saiki*, K. Takeuchi, M. Kuwata-Gonokami, T. Mitsuyu, Kazuhiro Ohkawa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

We study the optical nonlinearity just at the exciton resonance in ZnSe at 8 K. A sample with thickness of 2.4 μm is grown by molecular-beam epitaxy on a GaAs substrate. Using reflection-type polarization spectroscopy with weak picosecond optical pulses, we observe nonlinear phase shift, being free from incoherent processes caused by the accumulation of excitons. A huge nonlinear phase shift, 0.15 deg cm2/kW, whose effective χ(3) is over 10-2 esu, with a response time shorter than 20 ps is obtained.

Original languageEnglish (US)
Pages (from-to)192-194
Number of pages3
JournalApplied Physics Letters
Volume60
Issue number2
DOIs
StatePublished - Dec 1 1992

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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