Abstract
ABSTRACTIn this study, we present an investigation of the optical properties and band structures for the conventional and Fibonacci photonic crystals (PCs) based on some A5B6C7 ferroelectrics (SbSBr and BiTeCl). Here, we use one dimensional SbSBr and BiTeCl based layers in air background. We have theoretically calculated the photonic band structure and transmission spectra of SbSBr and BiTeCl based PC superlattices. The position of minima in the transmission spectrum correlates with the gaps obtained in the calculation. The intensity of the transmission depths is more intense in the case of higher refractive index contrast between the layers. In our simulation, we employed the finite-difference time domain technique and the plane wave expansion method, which implies the solution of Maxwell equations with centered finite-difference expressions for the space and time derivatives.
Highlights
Photonic crystals (PhCs) are structured dielectric composites that are designed and fabricated to have periodic optical properties that strongly alter the properties and propagation of light
We investigated the energy spectrum and optical properties in the Fibonacci-type photonic band gap (PBG) structures consisting of ferroelectric material (SbSBr and BiTeCl) [3] in detail by using the finite-difference timedomain (FDTD) method and the plane wave expansion method (PWE)
Band structure of 1D of BiTeCl and SbSBr based Conventional Photonic Crystal (CPCs) have been calculated in high symmetry directions in the first
Summary
Photonic crystals (PhCs) are structured dielectric composites that are designed and fabricated to have periodic optical properties that strongly alter the properties and propagation of light. The formation of photonic band gaps and the existence of quasi-localized light states have already been demonstrated for one (1D) and two-dimensional (2D) aperiodic structures based on Fibonacci and the Thue-Morse sequences [2]. To the best of our knowledge, a rigorous investigation of the band gaps and optical properties in the more complex types of aperiodic structures has not been reported so far. We investigated the energy spectrum and optical properties in the Fibonacci-type photonic band gap (PBG) structures consisting of ferroelectric material (SbSBr and BiTeCl) [3] in detail by using the finite-difference timedomain (FDTD) method and the plane wave expansion method (PWE). It is well known that SbSBr and BiTeCl are the ferroelectric material and their properties are very sensitive to external influences (temperature, electric field, stress, and light) [3]
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