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Laser excitation of surface waves over a dense plasma

Published online by Cambridge University Press:  01 January 1998

JETENDRA PARASHAR ,
H. D. PANDEY  and
V. K. TRIPATHI
JETENDRA PARASHAR
Affiliation:
Centre for Energy Studies, Indian Institute of Technology, New Delhi 110 016, India
H. D. PANDEY
Affiliation:
Centre for Energy Studies, Indian Institute of Technology, New Delhi 110 016, India
V. K. TRIPATHI
Affiliation:
Department of Physics, Indian Institute of Technology New Delhi 110 016, India
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Abstract

An intense short laser pulse incident on a metallic target produces an overdense plasma and excites a plasma surface wave via stimulated Compton scattering. The pump and the surface wave exert a beat-frequency ponderomotive force on the electrons in the skin layer, driving a heavily damped quasimode. The density perturbations due to the quasimode couple with the oscillatory velocity due to the pump to drive the surface wave. The growth period for the process turns out to be about 0.5 ps at a Nd[ratio ]glass laser intensity of 1016W cm−2 and a plasma density of 1.5 times the critical value.

Type
Research Article
Information
Journal of Plasma Physics , Volume 59 , Issue 1 , January 1998 , pp. 97 - 102
Copyright
1998 Cambridge University Press

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