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 time-harmonic 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 (ω0) and a B component which has an upshifted frequency ω1 =√ω20+ω2p. Here ωp 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 ω0, ωp 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;
- Plasma-Electromagnetic Interaction;
- Electromagnetic Pulses;
- Frequency Shift;
- Laplace Transformation;
- Plasma Physics