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Title: Second harmonic generation and its interaction with relativistic plasma waves driven by forward Raman instability in underdense plasmas

Abstract

High conversion efficiency (0.1{percent}) into second harmonic light generated in the interaction of a short-pulse intense laser with underdense plasma has been observed. In this experiment the plasma is created by optical field ionization of hydrogen or helium gas. Second harmonic spectra observed in the forward direction show Stokes and anti-Stokes satellites. This is due to the interaction of the second harmonic light with large-amplitude relativistic plasma waves. Second harmonic images taken at 30{degree} from the propagation axis show that the radiation is generated over a length of a few times the Rayleigh length and that the origin of the second harmonic light is due to the radial electron density gradients created by the ionization process and the radial ponderomotive force. {copyright} {ital 1997 American Institute of Physics.}

Authors:
 [1]; ; ;  [2]; ; ;  [3]; ; ;  [4]
  1. Laboratoire pour l`Utilisation des Lasers Intenses, Centre National de la Recherche Scientifique, Ecole Polytechnique, 91128 Palaiseau Cedex (France)
  2. Imperial College, London (United Kingdom)
  3. University of California at Los Angeles, Los Angeles, California 90024 (United States)
  4. Rutherford Appleton Laboratory, Chilton (United Kingdom)
Publication Date:
OSTI Identifier:
530918
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 4; Journal Issue: 4; Other Information: PBD: Apr 1997
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; PLASMA WAVES; HARMONIC GENERATION; RELATIVISTIC PLASMA; RAMAN SPECTRA; PLASMA INSTABILITY; PLASMA DENSITY; RAMAN EFFECT; IMAGES; ELECTRON DENSITY; LIGHT TRANSMISSION; IONIZATION

Citation Formats

Malka, V, Modena, A, Najmudin, Z, Dangor, A E, Clayton, C E, Marsh, K A, Joshi, C, Danson, C, Neely, D, and Walsh, F N. Second harmonic generation and its interaction with relativistic plasma waves driven by forward Raman instability in underdense plasmas. United States: N. p., 1997. Web. doi:10.1063/1.872201.
Malka, V, Modena, A, Najmudin, Z, Dangor, A E, Clayton, C E, Marsh, K A, Joshi, C, Danson, C, Neely, D, & Walsh, F N. Second harmonic generation and its interaction with relativistic plasma waves driven by forward Raman instability in underdense plasmas. United States. https://doi.org/10.1063/1.872201
Malka, V, Modena, A, Najmudin, Z, Dangor, A E, Clayton, C E, Marsh, K A, Joshi, C, Danson, C, Neely, D, and Walsh, F N. 1997. "Second harmonic generation and its interaction with relativistic plasma waves driven by forward Raman instability in underdense plasmas". United States. https://doi.org/10.1063/1.872201.
@article{osti_530918,
title = {Second harmonic generation and its interaction with relativistic plasma waves driven by forward Raman instability in underdense plasmas},
author = {Malka, V and Modena, A and Najmudin, Z and Dangor, A E and Clayton, C E and Marsh, K A and Joshi, C and Danson, C and Neely, D and Walsh, F N},
abstractNote = {High conversion efficiency (0.1{percent}) into second harmonic light generated in the interaction of a short-pulse intense laser with underdense plasma has been observed. In this experiment the plasma is created by optical field ionization of hydrogen or helium gas. Second harmonic spectra observed in the forward direction show Stokes and anti-Stokes satellites. This is due to the interaction of the second harmonic light with large-amplitude relativistic plasma waves. Second harmonic images taken at 30{degree} from the propagation axis show that the radiation is generated over a length of a few times the Rayleigh length and that the origin of the second harmonic light is due to the radial electron density gradients created by the ionization process and the radial ponderomotive force. {copyright} {ital 1997 American Institute of Physics.}},
doi = {10.1063/1.872201},
url = {https://www.osti.gov/biblio/530918}, journal = {Physics of Plasmas},
number = 4,
volume = 4,
place = {United States},
year = {Tue Apr 01 00:00:00 EST 1997},
month = {Tue Apr 01 00:00:00 EST 1997}
}