Linear and Nonlinear Spin-Photonic Properties of One-Dimensional Spin-Photonic Crystals

Spin-photonic crystals (SPCS) are very promising for applications in modern photonics because they possess an additional degree of freedom. The SPCs can be prepared its periodic one-, two-, three-dimensional structures composed of, at least. two different, magnetic and nonmagnetic or magnetic and magnetic materials with different refractive indices. The linear SP properties of one-dimensional SOCs with three-defect asymmetric structures were studied. The requirements of a Kerr rotation of about 45 degrees and a reflectance higher than 95% are met simultaneously with the 44-layer structure. The frequency response of the reflectance is greatly broadened as the length of the rear structure is increased, without any evident effect on the Kerr rotation. These conditions are also satisfied at both normal and slightly oblique incidence. In addition, we investigated the nonlinear optical response, including the optical bistability, of a one-dimensional SPC with two- defect layers upon intensive optical radiation in the polar SP configuration for the normal incidence of light. The relationship of defect modes inside the photonic band gap with the number of bilayers between defect layers was obtained. The cubic nonlinear polarization leads to the effects of optical bistability on the wavelengths of the defects modes.