Photonic crystals are periodic structures made of insulators. They the best option to design biosensors. In this paper, a photonic crystal biosensor containing insulation rods in air was designed and simulated. This used as circular nano-ring between internal external waveguides. At end waveguide, defect exists create an increase coupling distance. causes quality factor resonant wavelength disp...

The label-free detection of one of the cardiac biomarkers, myoglobin, using a photonic-crystal-based biosensor in a total-internal-reflection configuration (PC-TIR) is presented in this paper. The PC-TIR sensor possesses a unique open optical microcavity that allows for several key advantages in biomolecular assays. In contrast to a conventional closed microcavity, the open configuration allows...

in this paper, we proposed a novel structure for designing all optical filter based on photonic crystal structure. in designing the proposed filter, we simply employed a point defect localized between input and output waveguides as wavelength selecting part of the filter. the initial form of this filter is capable of selecting optical waves at =1560 nm, the transmission efficiency of the filte...

Photonic sensors have been developed for use in many laboratory and industrial environments for detection of a wide variety of physical, biological and chemical parameters. Both free space and guided wave optical sensors have been demonstrated for use in such diverse applications as food processing, electric power generation, jet engines, oil production, radiation detection, chemical and biolog...

Photonic crystal surfaces that are designed to function as wavelength-selective optical resonators have become a widely adopted platform for label-free biosensing, and for enhancement of the output of photon-emitting tags used throughout life science research and in vitro diagnostics. While some applications, such as analysis of drug-protein interactions, require extremely high resolution and t...

The total analytical error of a photonic crystal (PC) biosensor in the determination of ferritin and soluble transferrin receptor (sTfR) as biomarkers of iron deficiency anemia in chronic kidney disease (CKD) patients was evaluated against certified ELISAs. Antigens were extracted from sera of CKD patients using functionalized iron-oxide nanoparticles (fAb-IONs) followed by magnetic separation....

We propose a new optical biosensor based on photonic crystal with defect layer, which can determine the SARS-CoV-2 concentration in water by mode shift. Two models of dependence refractive index layer pathogen were considered. The optimal parameters for our device and thickness determined. It was also demonstrated that presence absorption investigated structure it is much more advantageous to w...