Enlarged omnidirectional photonic band gap in heterostructure of plasma and dielectric photonic crystals

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In this paper, we have shown theoretically that total omnidirectional photonic band gap (OBG) is enlarged considerably by using one-dimensional photonic crystal heterostructure composed of dielectric–dielectric and dielectric-plasma periodic structures. The OBG originates from a Bragg gap. The reflectance of considered structures are calculated by transfer matrix method (TMM). From the analysis it is found that the heterostructure of dielectric photonic crystals (DPCs) and plasma photonic crystals (PPCs) has very wide range of total OBG for both polarizations in comparison to the DPCs or PPCs, and the OBG can be notably enlarged by increasing the thickness and density of plasma layer.