Omnidirectional reflection of electromagnetic waves \non Thue-Morse dielectric multilayers

Abstract

\n \nWe report here the reflection of electromagnetic waves in\nself-similar Thue-Morse dielectric multilayers, which presents\nthe features of multiple omnidirectional photonic bandgaps (PBGs).\nThe number and the width of omnidirectional PBG depend on the\nratio of the refraction indexes and the thicknesses of the dielectric\nmaterials. The theoretical result is partly verified by optical\nobservation in Thue-Morse $\\chem{TiO_2/SiO_2}$ multilayers with\nvisible and near-infrared light. Our investigations provide a new\napproach to achieve the omnidirectional reflection in multiple\nfrequency ranges. With this progress, the application of\ndielectric reflection mirrors can be further widened.\n\n