Frequency shifting of electromagnetic radiation by sudden creation of a plasma slab
Abstract
The effect of switching a plasma medium of finite width (slab) on a timeharmonic plane electromagnetic wave propagating in free space is considered. The transient solution is obtained through the use of Laplace transforms. The solution is broken into two components: A component which in steady state has the same frequency as the incident wave frequency (ω_{0}) and a B component which has an upshifted frequency ω_{1} =√ω^{2}_{0}+ω^{2}_{p}. Here ω_{p} is the plasma frequency of the switched plasma slab. Numerical results are presented to show the effect of the slab width on the reflected and transmitted waves. A proper choice of ω_{0}, ω_{p} and the slab width will yield a transmitted electromagnetic pulse of significant strength at the upshifted frequency.
 Publication:

Journal of Applied Physics
 Pub Date:
 November 1992
 DOI:
 10.1063/1.352111
 Bibcode:
 1992JAP....72.4575K
 Keywords:

 Plasma Frequencies;
 Plasma Slabs;
 PlasmaElectromagnetic Interaction;
 Electromagnetic Pulses;
 Frequency Shift;
 Laplace Transformation;
 Plasma Physics