ABSTRACT
The interaction of an electromagnetic wave with a plasma slab is experimentally more realizable than an unbounded plasma medium. When an incident wave enters a pre-existing plasma slab, the wave will experience space discontinuity. If the plasma frequency is lower than the incident wave frequency, then the incident wave will be partially reflected and transmitted. When the plasma frequency is higher than that of the incident wave, the wave is totally reflected because the dielectric constant in the plasma is less than zero. However, if the width of the plasma slab is sufficiently thin, the wave can then be transmitted, which is known as tunneling effect [1]. For this time-invariant plasma, the reflected and transmitted waves have the same frequency as the source wave frequency and we call these A waves. The wave inside the plasma has a different wave number but the same frequency due to the requirement of the boundary conditions.
