Optical nonlinearities and ultrafast carrier dynamics in semiconductor doped glasses

V. S. Williams, G. R. Olbright, B. D. Fluegel, S. W. Koch, N. Peyghambarian

Research output: Contribution to journalArticle

52 Scopus citations

Abstract

The linear and nonlinear optical properties of commercially available CdSxSe1-x doped glasses are reviewed and the origin, magnitude, and temporal response of the nonlinearities are discussed. The room-temperature carrier dynamics are analysed using femtosecond interband pump-probe measurements. Our experimental results show the evolution of the carriers into a hot, quasi-thermal plasma distribution via electron-electron and electron-phonon scattering. The quasi-thermal distribution cools to the lattice temperature in about 750 fs filling the states just above the band-edge. This band-filling nonlinearity is seen as the bleaching of the absorption above the bandedge. The carrier recombination lifetime is measured to be ≅10 ps at higher carrier densities.

Original languageEnglish (US)
Pages (from-to)1979-1993
Number of pages15
JournalJournal of Modern Optics
Volume35
Issue number12
DOIs
StatePublished - Dec 1988

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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