Basic Studies Of Novel Magneto-optical Device

Magneto-optical (MO) devices, especially based on nonreciprocal characteristic, play an indispensable role in optical communication networks and integrated optics. With the growing needs driven by the rapid development of optical communication, the MO devices need to meet a higher standard of smart, system-integrated, smart and specialized.The purpose of this paper:Base on the MO effects, research on the novel MO device structures with the better function. The details are presented as follows:1. Starting from the macroscopic theory of MO effect, we expound the effect, caused by MO effect, on the optical material physical properties, such as permeability μ, permittivity ε and conductivity a. Combining with Maxwell’s equations, analysis of the reason that the MO effect break the Lorentz reciprocal law is presented. Perturbation theory formula is given. Then we clarify properties of the major MO material and try to explore the future development direction of magneto-optic material.2. A magneto-optical (MO) metal-sandwiched multilayered structure composed of metal, MO medium and dielectric buffer layers is presented and investigated. By utilizing the coupling between the dielectric waveguide and plasmonic modes, the long-range SPPs can achieve a pretty long propagation distance. The proposed structure takes the advantage of the SPPs which are sensitive to MO material properties, and two buffer layers with low refractive index that confine the field strongly. The results show that the NRPS is large, and the mode is strongly confined with low propagation loss.3. The isolators based on second-order and third-order microring resonators are discussed. The difificulty in applying magnetic field in production process is solved in our structures. And the isolator has the microsize, high isolation and the wider isolated spectrum because of the box-like response. 4. We analyze the perfect conductor boundary condition in the2D waveguides. In our analysis, the2D good conductor is treated as perfect conductor boundary. Waveguides with the perfect conductor boundary condition are analyzed. The result, which is compared with other references, shows that this analysis method is feasible.