In this paper, new photonic crystal optical filters with very unique characteristics are presented. The designed structures composed of stacked SiO2 isotropic dielectric slabs separated by monolayer graphene sheets. Defect layers nonlinear electro-optical polymer materials also inserted to behave as the resonant areas. Results obtained using transfer matrix method approach clearly reflect possibility wide band gap generation in absorption spectra proposed crystals terahertz frequency range....

Abstract In this study, we theoretically examined a high-precision optical biosensor composed of structurally chiral medium (SCM) with point group symmetry and an aluminum metallic layer, utilizing the Kretschmann configuration for detection cancer cells. For numerical analysis, transfer matrix method was employed to derive absorption spectrum structure when subjected p-polarized incident waves. The results indicate that two modes, surface plasmon polaritons (SPPs) waveguide can be excited...

Abstract Weyl semimetals, a class of topological materials exhibit significant optical non-reciprocity without the need for an external magnetic field or high-intensity light sources. Adding semimetal layers to one-dimensional photonic crystal as defect may improve structure’s non‐reciprocity. This study investigates influence chirping on non-reciprocal temporal evolution Gaussian pulses in with double-layer defects composed silicon dioxide and semimetal. Using transfer matrix method Fourier...

In biosensors research, much effort has been made to achieve high sensitivity detect lower concentrations of analyte in a solution by testing different kinds materials. this paper, we present biosensor based on Bloch surface waves photonic crystal (PhC) including graphene nanolayers under the Kretschmann configuration. The band structures, modes, reflectivity, and PhC are calculated transfer matrix method results compared with those structure without layers. Our investigations show that...

The transmission properties of a one-dimensional defective photonic crystal have been investigated using the transfer matrix method. A layer graphene-based hyperbolic metamaterial whose optical axis is tilted with respect to interface taken as defect. It shown that two kinds defect modes can be found in band gaps structure for TM-polarized waves. One kind created at frequency range which principle elements effective permittivity tensor same signs. this mode independent from orientation...

We investigate the transmission properties of Fibonacci quasiperiodic layered structures consisting a pair double positive (DPS), epsilon-negative (ENG) or/and mu-negative (MNG) materials.It is found that there exist polarization-dependent gaps which are invariant with change scaling and insensitive to incident angles.Analytical methods based on transfer matrices effective medium theory have been used explain DPS-MNG, DPS-ENG ENG-MNG multilayer structures.

We theoretically demonstrate a switchable multichannel near-infrared absorber in composite structure based on vanadium dioxide nanoparticles embedded between two and one-dimensional photonic crystal mirrors. A switching of absorption behavior is induced through the reversible semiconductor-to-metal phase transition via its temperature-dependent permittivity-thermo-optical effect. This leads to multi-wavelength reconfigurable optical response proposed from poorly absorbing highly absorbing....

Seeking operative terahertz (THz) devices has always stimulated considerable attention. Of particular interest is the THz beam splitter. Here, a tunable polarizing splitter (PBS) proposed based on graphene-embedded quarter-wave stack with central defect layer of air. The spectral performance structure investigated by transfer matrix method. It found that electromagnetic waves can be decomposed into two separate polarized at incident angles greater than critical angle. Furthermore, it shown...

Abstract The ability to control the frequency of defect modes in photonic crystals has led emergence novel applications. Researchers have recognized unique properties Weyl semimetals and explored their utilization crystals. This study investigates non-reciprocal incorporating examines behavior within these paper employs a crystal containing with two different structures. Initially, both structures are examined, followed by an analysis modes. results indicate that only utilizing semimetal...

The transmission properties of a one-dimensional graphene-based Thue–Morse quasiperiodic structure in which graphene nanolayers are embedded between dissimilar adjacent dielectric layers have been investigated. From the numerical results performed by transfer matrix method, it is found that possesses an omnidirectional photonic bandgap called graphene-induced (GIPBG) due to existence nanolayers, addition structural Bragg gaps. To design broadband THz filter, effects many parameters such as...

The dispersion properties of an anisotropic metamaterial composed periodic stacking graphene-liquid crystal layers are investigated in the far-infrared region.It is represented that this structure able to show both elliptic and hyperbolic dispersions using tunable graphene liquid crystal.The switching between two phases via control temperature, voltage external electric field studied.It shown can be used transmission reflection at interface air.

The transmission properties of a one-dimensional periodic structure with anisotropic defect layer is investigated using transfer matrix method. A homogeneously aligned nematic liquid crystal taken as defect. We show that the frequency and polarization mode modified by changing operating temperature orientation. Also dependent nonlinear response investigated. It shown threshold intensity needed to achieve bistability depends on temperature. So, can be used thermal switch at near mode.

The transmission properties of a one-dimensional photonic crystal containing uniaxial indefinite metamaterial are investigated using the transfer matrix method. It is shown that bandgaps structure strongly depend on orientation optical axis metamaterial. results show it possible to obtain Brewster condition for both TE and TM polarizations. This noticeably affects profiles electromagnetic field inside periodic structure.