Tunable Defect Mode in One-Dimensional Ternary Nanophotonic Crystal with Mirror Symmetry

Subject Areas : Journal of Optoelectronical Nanostructures

Robabeh Talebzadeh ¹ , Mehrdad Bavaghar ²

1 - Department of Physics, Tabriz Branch, Islamic Azad University, Tabriz, Iran
2 - Young Researchers and Elite Club, Tabriz Branch, Islamic Azad University, Tabriz, Iran

Received: 2017-09-20 Accepted : 2018-02-05 Published : 2017-12-01

Keywords: Defect mode, Nanophotonic crystal, Superconductor,

Abstract :

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.

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