Results 211 to 220 of about 6,585 (258)

Unified theory of spontaneous and stimulated rotational Raman scattering

Physical Review A, 1990
A general analytic theory of spontaneous and stimulated rotational Raman scattering is presented. This analytic description incorporates arbitrary polarization, time dependence, phase matching, and parametric coupling of the pump, Stokes, and anti-Stokes fields and the degeneracy of the rotational states. The analytic expressions for the time-dependent
, Hermann, , Chambers, , Dixit, , Karr
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Spontaneous Raman Scattering with Picosecond Pulses

1996
The first informations about vibrational relaxation processes in liquids were obtained by observing the time evolution of the spontaneous anti-Stokes Raman scattering from vibrational states with a non equilibrium population1. Due to the small raman scattering cross sections and the envolved relaxation time constants these experiment are rather ...
H. Graener, M. Hofmann
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Spontaneous-Raman-Scattering Efficiency and Stimulated Scattering in Silicon

Physical Review B, 1970
The absolute spontaneous-Raman-scattering efficiency and linewidth of the 521-${\mathrm{cm}}^{\ensuremath{-}1}$ optical mode of silicon have been measured at 77 K using a continuous laser (Nd in yttrium aluminum garnet) operating at 1.064 \ensuremath{\mu}m.
J. M. Ralston, R. K. Chang
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Pulsed spontaneous Raman scattering technique for luminous environments

Applied Optics, 1978
A gated photon counting system, cavity-dumped argon-ion laser, and a multipass retroreflecting light cell have been combined in a system to enhance spontaneous Raman scattering in luminous background situations. Signal-to-background ratio (SBR) has been improved a factor of 450 over a single-pass cw system with cw power equal to the pulsed average ...
A J, Mulac, W L, Flower, R A, Hill, D P, Aeschliman   +3 more
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Temperature measurements in spray flames by spontaneous Raman scattering

Optics Letters, 1996
Spontaneous Raman scattering was applied for quantitative temperature measurements in turbulent methanol spray flames. Possible interferences from laser-induced breakdown and elastic light scattered from the fuel drops were discriminated against by optoacoustic means. Polycyclic aromatic hydrocarbons were found to be a negligible source of fluorescence
A N, Karpetis, A, Gomez
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Dynamics of polynucleotide/solvent interaction with spontaneous Raman scattering

SPIE Proceedings, 1994
Isotropic and Anisotropic Raman spectra of RNA and DNA solutions have been obtained with a scanning monochromator system. The registration of the spectra was optimized for the special purpose of extracting bandwidth information and the non-coincidence effect. The following polynucleotides were selected: poly(rA) poly(rU) , poly(rA) . poly(rU) , poly(rk-
Otto, Cornelis, Terpstra, P.A., Greve, Jan   +2 more
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Theory of Spontaneous and Coherent Raman Scattering

1998
Abstract The universality of the phenomenon, the convenience of the experimental technique and the simplicity of the spectra obtained enable the effect to be used as an experimental aid to the solution of a wide range of problems in physics and chemistry.
Eric O Potma, X Sunney Xie
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Spontaneous Raman scattering by ground-state oxygen atoms

Optics Letters, 1981
We report the first known observation of Raman scattering by oxygen atoms. The (3)P(2)?(3)P(1) and (3)P(2)?(3)P(0) transitions in the electronic ground state that produced Raman shifts of 158 and 227 cm(-1) were detected. These transitions were observed in a fuel-lean atmospheric H(2) + O(2) flame. By comparing the O electronic and O(2) pure-rotational
C J, Dasch, J H, Bechtel
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Stimulated Raman laser excitation of spontaneous resonance Raman scattering

Chemical Physics Letters, 1980
The efficient conversion of the second and third harmonics of a Nd YAG laser to near UV radiation in the 395–500 nm range by stimulated Stokes (and anti-Stokes) Raman scattering (SRS) in a 1 m Raman oscillator containing compressed H2 or D2 is used as an excitation source for spontaneous resonance Raman spectroscopy (RRS).
Richard P. Van Duyne, Keith D. Parks
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Short-time squeezing in spontaneous Raman and stimulated Raman scattering

Quantum and Semiclassical Optics: Journal of the European Optical Society Part B, 1995
The non-classical effect of squeezing of light in spontaneous Raman and stimulated Raman processes are investigated under a short-time approximation based on a fully quantum mechanical approach. A Raman process is looked upon as a two-photon and one-phonon interaction process.
A Kumar, P S Gupta
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