Based on Nanocomposite Resonant Photonic Crystal Structures for Sensing Applications
The approximate theory of resonance phenomena in waveguides with volume gratings that allows obtaining analytical dependencies of the spectral position of guided-mode resonances on parameters of a waveguide structure was developed. Verification of the obtained results was carried out by the rigorous coupled-wave method (RCWA). Sensitivity of sensors based on waveguide gratings was estimated. Nanocomposite sensors were fabricated by holographic method. The characteristics of the sensor were measured. A modified method for refractive indices measurement was proposed. The sensitivity of the sensors for standard and modified measurement methods was compared. It was established that the proposed method allows increasing the sensitivity of the sensor by an order of magnitude.