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Title: Spectral shape of a signal in light-induced diffusive pulling (pushing) of particles into a light beam

Abstract

We study theoretically how the dependences of transport collision frequencies ν{sub i}, collision broadening γ and collision shift Δ of the levels on the velocity v of resonant particles influence lightinduced diffusive pulling (pushing) (LDP) effects in the framework of a generalised model of strong collisions in the case of velocitydependent collision rates (so-called kangaroo model). It is found that allowance for the dependences ν{sub i}(v), γ(v) and Δ(v) does not change the spectral shape of an LDP signal. In particular, in the case of low-intensity radiation, the spectral dependence of the LDP signal coincides with the absorption line shape. It is shown that the magnitude of the LDP effect is proportional to the difference between the diffusion coefficients of particles in the excited and ground states. It is found that the spectral anomalies previously predicted in the LDP effect [Gel'mukhanov F.Kh. JETP Lett., 55, 214 (1992)] for an idealised model of the Lorentz gas (the limiting case of heavy buffer particles), which arise due to the dependences ν{sub i}(v), γ(v) and Δ(v), are typical only for this gas. At a realistic ratio of the masses of absorbing and buffer particles, spectral anomalies do not occur in the LDP effect.more » (nonlinear optical phenomena)« less

Authors:
;  [1]
  1. Institute of Automation and Electrometry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk (Russian Federation)
Publication Date:
OSTI Identifier:
22551305
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 45; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ABSORPTION; COLLISIONS; DIFFUSION; ELEMENTARY PARTICLES; GROUND STATES; LORENTZ GAS; PHOTON BEAMS; SIGNALS; SPECTRA; VELOCITY; VISIBLE RADIATION

Citation Formats

Parkhomenko, A I, and Shalagin, A M. Spectral shape of a signal in light-induced diffusive pulling (pushing) of particles into a light beam. United States: N. p., 2015. Web. doi:10.1070/QE2015V045N02ABEH015556.
Parkhomenko, A I, & Shalagin, A M. Spectral shape of a signal in light-induced diffusive pulling (pushing) of particles into a light beam. United States. doi:10.1070/QE2015V045N02ABEH015556.
Parkhomenko, A I, and Shalagin, A M. Sat . "Spectral shape of a signal in light-induced diffusive pulling (pushing) of particles into a light beam". United States. doi:10.1070/QE2015V045N02ABEH015556.
@article{osti_22551305,
title = {Spectral shape of a signal in light-induced diffusive pulling (pushing) of particles into a light beam},
author = {Parkhomenko, A I and Shalagin, A M},
abstractNote = {We study theoretically how the dependences of transport collision frequencies ν{sub i}, collision broadening γ and collision shift Δ of the levels on the velocity v of resonant particles influence lightinduced diffusive pulling (pushing) (LDP) effects in the framework of a generalised model of strong collisions in the case of velocitydependent collision rates (so-called kangaroo model). It is found that allowance for the dependences ν{sub i}(v), γ(v) and Δ(v) does not change the spectral shape of an LDP signal. In particular, in the case of low-intensity radiation, the spectral dependence of the LDP signal coincides with the absorption line shape. It is shown that the magnitude of the LDP effect is proportional to the difference between the diffusion coefficients of particles in the excited and ground states. It is found that the spectral anomalies previously predicted in the LDP effect [Gel'mukhanov F.Kh. JETP Lett., 55, 214 (1992)] for an idealised model of the Lorentz gas (the limiting case of heavy buffer particles), which arise due to the dependences ν{sub i}(v), γ(v) and Δ(v), are typical only for this gas. At a realistic ratio of the masses of absorbing and buffer particles, spectral anomalies do not occur in the LDP effect. (nonlinear optical phenomena)},
doi = {10.1070/QE2015V045N02ABEH015556},
journal = {Quantum Electronics (Woodbury, N.Y.)},
number = 2,
volume = 45,
place = {United States},
year = {Sat Feb 28 00:00:00 EST 2015},
month = {Sat Feb 28 00:00:00 EST 2015}
}