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Study on the threshold intensity of two-photon absorption in semiconductors

  • Xueru Zhang*
  • , Chunfei Li
  • *Corresponding author for this work
  • Harbin Institute of Technology

Research output: Contribution to journalArticlepeer-review

Abstract

The dynamic process of nonlinear absorption in a semiconductor medium caused by nonlinear optical pulse propagation under nonresonant condition was studied. The threshold intensity formula was derived under the limit of small absorption, which describes the relative size of two-photon absorption and free carrier absorption. The effect of the sample thickness on the threshold intensity was analyzed. The main origin of the great disparity in the measured values of two-photon absorption coefficient of GaAs was explained.

Original languageEnglish
Pages (from-to)309-312
Number of pages4
JournalHongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves
Volume15
Issue number4
StatePublished - Aug 1996

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