Some New Band Characteristics in One-Dimensional Plasma Dielectric Photonic Crystals

<正> Propagation of electromagnetic waves in one-dimensional plasma dielectric photoniccrystals,the superlattice structure consisting of alternating plasma and dielectric materials,isstudied theoretically for oblique incidence by using the transfer matrix method.Our resultsshow that complete photonic band gaps for all polarizations can be obtained in one-dimensionalplasma dielectric photonic crystals.These structures can exhibit a new type of band or gap,for theincidence other than the normal one,near frequencies where the electric permittivity of the plasmalayer changes sign.This new band or gap arises,from the dispersive properties of the plasma layer,only for transverse magnetic polarized waves,and its width increases with the increase in incidentangle.This differential behavior under polarization can be utilized in the design of an efficientpolarization splitter.The existence of both photonic gaps and resonance transmission bands isdemonstrated for experimentally realizable structures such as double electromagnetic barriers.