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Total absorption of unpolarized radiation in a stratified plasma

Published online by Cambridge University Press:  09 March 2009

S. Vukovic ,
R. Dragila  and
A. M. Smith
S. Vukovic
Affiliation:
Laser Physics Centre, Research School of Physical Sciences, The Australian National University, GPO Box 4, Canberra, ACT 2601, Australia
R. Dragila
Affiliation:
Laser Physics Centre, Research School of Physical Sciences, The Australian National University, GPO Box 4, Canberra, ACT 2601, Australia
A. M. Smith
Affiliation:
Laser Physics Centre, Research School of Physical Sciences, The Australian National University, GPO Box 4, Canberra, ACT 2601, Australia
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Abstract

We demonstrate that 100% absorption of an unpolarized monochromatic light can be achieved in a plasma with a density profile characterized by a presence of a cavity and a steep density gradient across the critical region. These profiles can occur in a laser produced plasma due to the radiation pressure effects. The conditions were found when both s- and p -polarizations of the electromagnetic radiation which is obliquely incident upon a stratified plasma are totally absorbed at same angle of incidence. The effect is due to simultaneous excitation of surface and guided modes which are eigenmodes of the considered plasma structure. When these modes are excited some additional conditions must be satisfied which allow for full compensations of all dissipative processes by the radiation energy inflow.

Type
Research Article
Information
Laser and Particle Beams , Volume 6 , Issue 2 , May 1988 , pp. 255 - 264
Copyright
Copyright © Cambridge University Press 1988

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