Surface-wave-induced high transparency of an overdense warm plasma layer

Abstract

We have found conditions in which a structure consisting of an overdense warm plasma layer spaced between two underdense warm plasma layers becomes transparent to a p-polarized obliquely incident electromagnetic wave. The energy of the incident wave is transferred across the overdense region by a pair of coupled surface waves.

Evanescent wave interference and the total transparency of a warm high-density plasma slab

“…For comparison, Fig. (7) shows the magnetic field amplitude for the case when there is no surface mode excited at the interface. Only exponentially decaying solution to the field equations is observed.…”

“…As one can see the electromagnetic field in a bulk plasma is represented as a superposition of a transverse and longitudinal perturbations that are completely decoupled from each other. At this point we would like to bring reader's attention to the fact that just as in the cold plasma case, solution (7) describes decaying branches for the transverse fields as well as for a longitudinal field in the overcritical plasma region (described by the decay factor γ 2 in our notations). However, the density perturbation as well as the associated longitudinal electric field in the undercritical plasma region are described not by an evanescent/decaying branch, but rather by a propagating oscillatory function (γ 1 takes on purely imaginary value in this region).…”

“…Thus, the anomalous transmission occurs even for the system consisting of an undercritical density plasma layer adjacent to an overcritical density plasma slab, so that there is no need to form a sandwich-like structure as argued in Refs. ([2,6,7]) in which a…”

Resonant transparency of materials with negative permittivity

“…Thus, the anomalous transmission occurs even for a system consisting of an undercritical density plasma layer adjacent to an overcritical density plasma slab, so that there is no need to form a sandwich-like structure as argued in Refs. [2,13] in which a second surface plasma wave has to be excited on the opposite side of the overcritical density layer to achieve the same effect. In other words, the anomalous light transmission can be achieved through excitation of a single surface plasma wave.…”

Birefringence-induced polarization-independent and nearly all-angle transparency through a metallic film

“…EM wave tunneling through metals has always been intriguing and has received great attention recently [1][2][3][4][5][6][7]. In two decades ago, high transparency of classic opaque metallic films had been studied by using prism couplers [8]. Recently, an array of subwavelength holes, which can support surface plasmons (SP's), were proposed to get high transmission through metallic films [1,[9][10][11].…”