Control of transmission spectra of planar photonic crytal with LC defect

The polarized transmission spectra of the one-dimensional photonic crystal with a planar aligned nematic liquid crystal defect layer have been studied theoretically and experimentally. An effect ofthe oblique incidence ofthe light, as well as the temperature of the defect layer, on the spectral positions of the defect modes has been investigated. It is shown that an increase of the incidence angle results in the shift of the defect modes to short-wave range and this tendency appears more pronounced for TM polarization. The spectral shift of the defect modes at 20 nm due to the change of refractive index of the liquid crystal at heating to the isotropic phase was exhibited. The theoretical dependencies of transmission spectra ofphotonic crystal under study agree well with the experimental data.