Photonic structures for optical sensors

Abstract

This thesis deals with the numerical simulations of the optical response of multi-layered photonic structures - so called one-dimensional photonic crystals. Such structures support excitation of the Bloch surface waves. Emphasize is placed on the sensor performance of the structures. Both gaseous and liquid analytes are considered. Reflectance and transmittance spectra are calculated using transfer matrix method. Subsequently, the results of computations are compared with experimental ones. Next, a new method based on spectral interference of TE and TM polarized waves is presented. With use of this method, the resolution of the sensor is significantly improved. Direct comparison of sensors based on surface plasmon polaritons and Bloch surface waves is also addressed. Last but not least the properties of the cavity formed by two photonic crystals are investigated too.