Transmission of electromagnetic waves in planar, cylindrical, and spherical dielectric layer systems and their applications

Transmission of electromagnetic waves propagating in planar, cylindrical, and spherical single dielectric layer, double-barrier resonant tunneling and multiple period Bragg reflector systems have been systematically studied by the transfer matrix method. Interesting features are found in the transmission spectra of the systems with cylindrical and spherical geometries, due to the coherence of the propagation waves in these systems. In particular, an increase of the resolution power (sharper transmission peaks) in the double-barrier resonant tunneling system is demonstrated in the cylindrical and spherical structures compared to that of the planar structure. Universal behavior, that the transmission at zero frequency limit decreases substantially as the propagation wave changes from plane to cylindrical wave and to spherical wave, has been shown in the spectra of these systems. Potential applications in reducing the radiation energy loss for transferring large density alternative current are discussed.