Analysis of thickness-dependent optical properties in a one-dimensional superconducting photonic crystal

The thickness-dependent optical properties in a onedimensional superconducting photonic crystal consisting of alternating superconductor and dielectric layers are theoretically investigated by using the transfer matrix method in a stratified structure. Based on the calculated transmittance spectrum, the photonic bandgaps, passbands, and the bandedges are analyzed as functions of the thicknesses of the constituents. It is shown that the band shift is primarily dominated by the thickness change of the dielectric layer and the band enhancement can be mainly controlled by the thickness change in the superconducting layer. By choosing a suitable thickness for the superconducting or dielectric material, the higher second and third passbands can be forced to merge as a single wider second passband.