Total absorption of an electromagnetic wave by an overdense plasma

Phys Rev Lett. 2005 Oct 14;95(16):165003. doi: 10.1103/PhysRevLett.95.165003. Epub 2005 Oct 14.

Abstract

We show both theoretically and experimentally that an electromagnetic wave can be totally absorbed by an overdense plasma when a subwavelength diffraction grating is placed in front of the plasma surface. The absorption is due to dissipation of surface plasma waves (plasmons polaritons) that have been resonantly excited by the evanescent component of the diffracted electromagnetic wave. The developed theoretical model allows one to determine the conditions for the total absorption.