Wood anomalies in the vicinity of 3D Bragg diffraction from hybrid opaline photonic crystals

2nd International School and Conference Saint-Petersburg OPEN on Optoelectronics, Photonics, Engineering and Nanostructures

Nikolaev, V.S.^1,2 ; Voronov, M.M.^1 ; Yakovlev, S.A.^1 ; Pevtsov, A.B.^1

Ioffe Physical-Technical Institute, Politekhnicheskaya 26, St Petersburg

194021, Russia^1

St. Petersburg State Electrotechnical University LETI, St. Petersburg

197376, Russia^2

关键词: Bragg diffraction;    Coefficient of reflection;    Coupling coefficient;    Diffraction resonance;    Effective refractive index;    Hybrid photonic crystals;    Hybrid structure;    Optical reflection spectrum;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/643/1/012048/pdf
DOI  :  10.1088/1742-6596/643/1/012048

来源: IOP

【 摘 要 】

For hybrid chalcogenide/opal photonic crystals the optical reflection spectra demonstrating the interplay of diffraction resonances such as 3D Bragg diffraction and resonant Wood anomaly have been studied. The coupling coefficient of the Wood and Bragg waves has been estimated on the basis of the coupled-waves approach and the concept of the effective refractive index of the wave-guiding surface layer of the hybrid structure. A phenomenological expression for the coefficient of reflection from a hybrid photonic crystal allowing one to investigate the interference of the Wood anomalies has been proposed.