Fedorin И. Electrodynamical properties of the thin-film periodical structures

Object: the process of electromagnetic waves propagation in one-dimensional thin-layer periodic structure, located in a magnetic field. The purpose: the theoretical description of electrodynamic properties of a periodic structure "semiconductor-dielectric" in an external magnetic field. Methods: The theoretical analysis is based on the Maxwell equations and constitutive equations with the boundary conditions for each layer of the structure consisting from the continuity of the tangential components of the electric and magnetic fields at the boundaries of the structure. Also the receiving of the dispersion relations for the studied layered periodic structure is carried out using the method of the transformation matrix and Floquet theorem. Results: It is demonstrated for the first time that a thin-film periodic structure consisting of layers of dielectric and semiconductor in an external magnetic field directed parallel to the boundary of the layers, in the long-wave approximation is optically biaxial crystal. It has been determined that near to resonances of the effective dielectric permittivity the control of electrodynamic properties of such structure is possible by means of change of magnetic field and thickness of layers, namely slowing of phase velocity of surface waves, the change in the penetration depth, the change of position of Brewster angle and the Bragg resonances, the control of polarization characteristics. Field of application: physics of a solid state, radio physics, physics of thin films