High harmonic generation in relativistic laser-plasma interaction

S. Banerjee, A. R. Valenzuela, R. C. Shah, A. Maksimchuk, D. Umstadter

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

High harmonics generated due to the scattering of relativistic electrons from high intensity laser light is studied. The experiments are carried out with an Nd:Glass laser system with a peak intensity of 2×10 18Wcm -2 in underdense plasma. It is shown that, at high intensities, when the normalized electric field approaches unity, in addition to the conventional atomic harmonics from bound electrons there is significant contribution to the harmonic spectrum from free electrons. The characteristic signatures of this are found to be the emission of even order harmonics, linear dependence on the electron density, significant amount of harmonics even with circular polarization and a much smaller spatial region over which these harmonics are produced as compared to the atomic case. Imaging of the harmonic beam shows that it is emitted in a narrow cone with a divergence of 2 to 3 degrees.

Original languageEnglish (US)
Pages (from-to)2393-2398
Number of pages6
JournalPhysics of Plasmas
Volume9
Issue number5
DOIs
StatePublished - May 1 2002
Externally publishedYes

Fingerprint

laser plasma interactions
relativistic plasmas
harmonic generations
harmonics
glass lasers
circular polarization
high power lasers
free electrons
unity
divergence
cones
electrons
signatures
electric fields
scattering

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Banerjee, S., Valenzuela, A. R., Shah, R. C., Maksimchuk, A., & Umstadter, D. (2002). High harmonic generation in relativistic laser-plasma interaction. Physics of Plasmas, 9(5), 2393-2398. https://doi.org/10.1063/1.1470167

High harmonic generation in relativistic laser-plasma interaction. / Banerjee, S.; Valenzuela, A. R.; Shah, R. C.; Maksimchuk, A.; Umstadter, D.

In: Physics of Plasmas, Vol. 9, No. 5, 01.05.2002, p. 2393-2398.

Research output: Contribution to journalArticle

Banerjee, S, Valenzuela, AR, Shah, RC, Maksimchuk, A & Umstadter, D 2002, 'High harmonic generation in relativistic laser-plasma interaction', Physics of Plasmas, vol. 9, no. 5, pp. 2393-2398. https://doi.org/10.1063/1.1470167
Banerjee, S. ; Valenzuela, A. R. ; Shah, R. C. ; Maksimchuk, A. ; Umstadter, D. / High harmonic generation in relativistic laser-plasma interaction. In: Physics of Plasmas. 2002 ; Vol. 9, No. 5. pp. 2393-2398.
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