tunable defect mode in one-dimensional ternary nanophotonic crystal with mirror symmetry

In this paper, the properties of the defect mode in the photonic band gap of one-dimensional ternary photonic crystals containing high temperature superconductor layer (spcs) have been theoretically investigated. we considered the quasi-periodic layered structures by choosing two order of ternary thue-morse structures with mirror symmetry. we investigated the transmission spectra of these structures by using the transfer matrix method and two-fluid model. it is found that the location of defect mode and the range of photonic band gap can be changed by the incident angle. so that, the defect mode blue-shifted and disappeared by increasing the incidence angle. we observed an omnidirectional photonic band gap for the te polarization that its range is from 456nm to 520nm. also, the defect mode can be tuned by the temperature. as a result, the width of defect mode can be decreased by increasing the temperature, especially in the vicinity of the critical temperature of superconductor layer. this kind of spcs has potential applications in filters, sensors and so on.