ENHANCEMENT OF OMNIDIRECTIONAL REFLECTION IN PHOTONIC CRYSTAL HETEROSTRUCTURES

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Abstract
—In this paper we have theoretically studied the omnidirec- tional total reflection frequency range of a multilayered dielectric het- erostructures. Three structures of Na3AlF6/Ge multilayer have been studied. The thickness of the two layers of the first and second struc- ture is differing from each other and the third photonic structure is the combination of first and second structures. Using the Transfer Matrix Method (TMM) and the Bloch theorem, the reflectivity of one dimen- sional periodic structure for TE- and TM-modes at different angles of incidence is calculated. From the analysis it is found that the proposed structure has very wide range of omnidirectional total frequency bands for both polarizations.