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Enhanced harmonic generation by propagation of two-color p-polarized laser beams in plasma

Published online by Cambridge University Press:  16 February 2017

E. Agrawal ,
N.K. Verma  and
P. Jha
E. Agrawal
Affiliation:
Department of Physics, University of Lucknow, Lucknow-226007, India
N.K. Verma
Affiliation:
Department of Physics, University of Lucknow, Lucknow-226007, India
P. Jha*
Affiliation:
Department of Physics, University of Lucknow, Lucknow-226007, India
*
*Address correspondence and reprint requests to: P. Jha, Department of Physics, University of Lucknow, Lucknow-226007, India. E-mail: [email protected]
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Abstract

A theoretical model is developed for studying the generation of third-harmonic radiation by the interaction of obliquely incident, two-color p-polarized laser beams with spatially varying plasma density. The ratio of the fundamental frequencies of the two laser beams are considered to be an arbitrary integer. The amplitude of harmonic radiation obtained by oblique incidence of two-color laser fields propagating in homogeneous plasma is enhanced in comparison with that obtained by normal incidence of two-color laser beams. The periodicity of the plasma density allows the harmonic radiation to be phase-matched, leading to further increase in the amplitude of phase-matched harmonic radiation by an order of magnitude. The amplitude of the generated harmonic radiation increases with the increase in angle of incidence.

Keywords

Oblique incidenceRippled density plasmaThird-harmonic radiationTwo-color laser beams
Type
Research Article
Information
Laser and Particle Beams , Volume 35 , Issue 1 , March 2017 , pp. 182 - 189
Copyright
Copyright © Cambridge University Press 2017 

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