title: Coherent anti-Stokes Raman scattering of two-phonon complexes in diamond.
abstract: Coherent anti-Stokes Raman scattering (CARS) associated with the second-order Raman process has been confirmed in diamond. Frequency dependence of CARS was analyzed using two-color synchronously-generated picosecond pulses. Resonance enhancement of chi((3)) was observed at an energy shift corresponding to the overtone Sigma branch (K point) phonon, as well as the fundamental Raman-active Gamma((25+)) phonon. The excitation spectrum of CARS at the two-phonon resonance region showed dispersive dependence, reflecting the interference of resonant CARS and nonresonant four-wave mixing scattering.
authors.affiliation: National Institute for Materials Science, 1 Namiki, Tsukuba 305-0044, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Kuroda
authors.forename: Peter A
authors.initials: PA
authors.lastname: Zhokhov
authors.forename: Kenji
authors.initials: K
authors.lastname: Watanabe
authors.forename: Aleksey M
authors.initials: AM
authors.lastname: Zheltikov
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Sakoda
mesh_terms: D018130:Diamond; D004867:Equipment Design; D007834:Lasers; D008027:Light; D055095:Optics and Photonics; D012542:Scattering, Radiation; D013053:Spectrophotometry / Q000379:methods; D013059:Spectrum Analysis, Raman / Q000379:methods
chemical_list: D018130:Diamond