Explanation of anomalous polariton dynamics in LiTaO3

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

78 Scopus citations

Abstract

Single and multiple-pulse impulsive stimulated Raman-scattering (ISRS) experiments are used to investigate the anomalously high damping rates of the lowest frequency A1 polariton in LiTaO3. The wave-vector dependence of the response reveals coupling of the polariton to a weakly Raman-active, low-frequency relaxational mode as well as to two underdamped modes of a different symmetry. Inclusion of the coupled modes yields quantitative agreement between the results and the predictions of a previously developed theory for light scattering from polaritons.

Original languageEnglish (US)
Pages (from-to)916-931
Number of pages16
JournalPhysical Review B
Volume51
Issue number2
DOIs
StatePublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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