| Popis: |
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 as periodic one-, two-, and three-dimensional structures composed of, at least, two di erent magnetic and nonmagnetic, or magnetic and magnetic materials with di erent refractive indices. The linear SP properties of one-dimensional SPCs with three-defect asymmetric structures were studied. The requirements of a Kerr rotation of about 45 and a re ectance higher than 95 % are met simultaneously with the 44-layer structure. The frequency response of the re ectance is greatly broadened as the length of the rear structure is increased, without any evident e ect on the Kerr rotation. These conditions are also satis ed 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 twodefect layers upon intensive optical radiation in the polar SP con guration 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 e ects of optical bistability on the wavelengths of the defect modes. |
