Femtosecond Impulsive Stimulated Raman Scattering Studies of LiTaO3

Gary P. Wiederrecht, Thomas P. Dougherty, Lisa Dhar, Keith A. Nelson, A. M. Weiner, D. E. Leaird

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Impulsive stimulated Raman scattering (ISRS) experiments on LiTaO3 were conducted over a wide range of scattering wavevectors. The results permit explanation of the anomalously high and wavevector-dependent damping rates of the low-frequency phonon-polariton mode in terms of coupling of the polariton to a weakly Raman-active low-frequency relaxational mode and to two heavily damped vibrational modes. ISRS experiments at low temperatures were made possible through the use of multiple-pulse ISRS experiments where photorefractive damage precluded experiments with single excitation pulses.

Original languageEnglish (US)
Pages (from-to)1-16
Number of pages16
JournalFerroelectrics
Volume144
Issue number1
DOIs
StatePublished - 1993
Externally publishedYes

Keywords

  • femtosecond optical pulse shaping
  • phonon-polariton modes
  • time resolved optical spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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