Enlargement of Omnidirectional Bandgap Region By Using A One-Dimensional Quarternary Plasma Photonic Crystal

We demonstrate by theoretical analysis a novel way to enhance the omnidirectional total reflection frequency range of a one-dimensional plasma photonic crystal by using a quarternary periodic structure (i.e. four layers constituting a period of the lattice). The omnidirectional total reflection frequency range of a one-dimensional ternary plasma photonic crystal reported earlier was substantially enlarged and the structure size considerably reduced when the ternary structure was replaced by a quarternary one. The nature of the enlargement was such that the omniband of the quarternary structure contained the entire omniband of the ternary structure. The proposed structure is also smaller and has a wider omniband as compared to the heterostructured dielectric plasma photonic crystal reported earlier. Moreover, only two materials are also used in the proposed structure, thus simplifying the fabrication procedure.