Abstract Tuberculosis is one of the most widespread infectious and deadliest diseases in the world. The death percentage is larger than that in the case of the current Coronavirus. Bio-photonic sensors represent a promising option for developing reliable, simple, and affordable tools for the effective detection of tuberculosis. In this paper, a novel design of an optical biosensor will be used as a tuberculosis detector based on a resonance cavity with high sensitivity in one-dimensional photonic crystals demonstrated theoretically. The results show that the increase of the defect layer thickness shifts the defect mode to a longer wavelength region. Besides, it is shifted to a shorter wavelength region via the increase of the incidence angle. The change in thickness of the defect layer and incident angle of light cause an optimization for our suggested structure and the sensitivity reaches 1390 nm/RIU. Our structure is very simple for industrial design.

The Fano resonance and EIR properties in different topological one-dimensional superconductor photonic crystals has been investigated theoretically using the Transfer Matrix Method (TMM). Different types of periodic heterostructures are studied and they are designed by alternating pairs of superconductor materials such (Nb/BSCCO), (Rb3C60/ YBa2Cu3O7) and (K3C60/(BiPb)2Sr2Ca2Cu3Oy). All artificial periodic structures are sacked by dielectric cap layer at different induced fields. To exam the efficiency of the reported structures, different parameters are used for analysis such as layers thicknesses, temperature, angle of incidence, the kind of superconductor materials and the dielectric constant of the cap layer. The investigation results exhibit the presence of tunable Fano resonances and EIR resonance peak accompanied by asymmetrical line shape and they are very sensitive to the dielectric cap layer, the superconductor materials and the wave incidence angle.

Abstract In the present work, electromagnetic wave properties of the Fibonacci one-dimention photonic crystal (1DPC) structure consisting of double negative materials incorporated high Tc superconductor are theoretically investigated. It is found that the quasi-periodic structure created a photonic band gap as a periodic structure. We have calculated the transmittance spectra and noticed a wide band gap which can be controlled in it by the thickness of metamaterial, superconductor layer and incidence angle.Photonic band gap became more noticeable by increasing the thickness of the metamaterial and superconductor layers. The structure was affected by changing the incident angle and the band gap width increase with a noticeable shift to short wavelength region. Additionally, the photonic band gap shifted to longer wavelength value with increasing the operating tempeature. Furthermore, we have studied the pressure effects and we found the change in the location and width of photonic band gap.