Anomalous polariton dynamics in LiTaO3

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

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

The techniques of single and multiple-pulse impulsive stimulated Raman scattering (ISRS) are used to explore the dynamics of the lowest frequency A1 polariton mode in the ferroelectric crystal lithium tantalate. This time-domain technique which allows unambiguous characterization of the frequency and damping dispersion of the polariton reveals anomalously high damping rates for the A1 mode. The damping behavior is explained by a model that includes coupling of the polariton to a weakly Raman-active relaxational mode and to two E-symmetry modes.

Original languageEnglish (US)
Pages (from-to)103-118
Number of pages16
JournalFerroelectrics
Volume150
Issue number1
DOIs
StatePublished - Dec 1993
Externally publishedYes

Keywords

  • impulsive stimulated Raman scattering
  • lithium tantalate
  • polariton

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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