A Novel Comb-Like Plasma Photonic Crystal Filter in the Presence of Evanescent Wave

The transmission properties of one-dimensional photonic crystals (PCs) consisting of plasma and lossless dielectric have been systematically studied through the transfer matrix method. In this structure, plasma is used as a kind of single-negative (permittivity-negative) material. Because of the coupling between evanescent waves in plasma layers and propagation waves in dielectric layers, comb-like resonant peaks in transmission band are formed without adding any defect layer in plasma PCs. The numbers and positions of peaks can be modulated by the number of the periods, the plasma frequency, the thickness of plasma layers, plasma collision frequency, and the incident angle.