PICOSECOND LIBRATIONAL DYNAMICS IN HYDROGEN BONDED MOLECULAR CRYSTALS BY TIME RESOLVED COHERENT RAMAN SPECTROSCOPY.

Eric L. Chronister, Dana D. Dlott

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Optical phonon decay in hydrogen bonded molecular crystals is investigated by time resolved coherent Raman spectroscopy. The importance of low frequency motion in chemically important systems is examined. The low temperature phonon lifetimes, in general, were found to decrease monotonically with phonon frequency. This reflects the density of accepting phonon modes and the decay mechanism. Phonon relaxation in the complicated hydrogen bonded crystals of nucleic acid bases indicate that a more detailed theory is needed than that used to describe phonon decay in hydrogen bonded crystals of amino acids. The measurement of the lifetime and frequencies of the low energy modes can be important to an understanding of chemistry in condensed phases. Picosecond CARS has been used to establish the timescales involved for these motions and has enabled us to uncover the relative lifetimes of many optical phonons in the same crystal.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE
Pages97-101
Number of pages5
ISBN (Print)0892526556, 9780892526550
DOIs
StatePublished - Jan 1 1986

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume620
ISSN (Print)0277-786X

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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