Optical anisotropy of cubic photonic crystals under conditions of multiple-mode light propagation

18th International Conference PhysicA.SPb

Ukleev, T.A.^1,2 ; Yurasova, D.I.^3 ; Shevchenko, N.N.^3 ; Sel'Kin, A.V.^1,2

Solid State Physics Department, Saint Petersburg State University, Ulyanovskaya 1, Peterhof

198504, Russia^1

Spectroscopy of Solids Laboratory, Ioffe Physical Technical Institute, Polytekhnicheskaya 26, St-Petersburg

194021, Russia^2

Synthesis of Peptides and Polymer Microspheres Laboratory, Institute of Macromolecular Compounds, RAS, Bolshoy pr. 31, St-Petersburg

199004, Russia^3

关键词: Angle of Incidence;    Azimuthal orientation;    Bragg diffraction;    Cross polarizations;    Cross-polarization effect;    Opal like photonic crystal;    Polystyrene spheres;    Resonant enhancements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/769/1/012051/pdf
DOI  :  10.1088/1742-6596/769/1/012051

来源: IOP

【 摘 要 】

Bragg reflection spectra of light are studied for opal-like photonic crystals made of polystyrene spheres. A resonant enhancement of reflectivity is observed in cross-polarization configuration of the analyzer and polarizer when varying the azimuthal orientation of a sample in respect to the incidence plane. The cross-polarization effect takes place at oblique incidence of light on the lateral (111) crystal plane with the plane of incidence being non-perpendicular to the inclined (11-1) crystal plane. The effect is shown to be due to the multiple Bragg diffraction of light when the resonant Bragg conditions are fulfilled at a certain angle of incidence and azimuth for the lateral and inclined crystal planes simultaneously.