Experimental and numerical analysis of narrowband coherent Rayleigh-Brillouin scattering in atomic and molecular species

Barry M. Cornella, Sergey F. Gimelshein, Mikhail N. Shneider, Taylor C. Lilly, Andrew D. Ketsdever

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Coherent Rayleigh-Brillouin scattering (CRBS) line shapes generated from all narrow-band pump experiment, Direct Simulation Monte-Carlo (DSMC) approach, and published kinetic line shape models are presented for argon, molecular nitrogen, and methane at 300 & 500 K and 1 atm. The kinetic line shape models require uncertain gas properties, such as bulk viscosity, and assume linearization of the kinetic equations from low intensities (<1 x 1015 W/m2) operating in the perturbative regime. DSMC, a statistical approach to the Boltzmann equation, requires only basic gas parameters available in literature and simulates the forcing function from first principles without assumptions on laser intensity. The narrow band experiments show similar results to broadband experiments and validate the use of DSMC for the prediction of CRBS line shapes.

Original languageEnglish (US)
Pages (from-to)12975-12986
Number of pages12
JournalOptics Express
Volume20
Issue number12
DOIs
StatePublished - Jun 4 2012

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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