Lyubchans'kyj M. Peculiarities of the light reflection from magnetically-ordered medium.

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0402U000030

Thesis Registration Form

0402U000030.pdf

Applicant for

Specialization

  • 01.04.11 - Магнетизм

20-12-2001

Specialized Academic Board

Д 11.184.01

Essay

The thesis is devoted to the theoretical investigation of the linear and nonlinear optical effects at the reflection of light from magnetically-ordered media. Phenomena of total internal reflection (TIR) of light and lateral shift of reflected light, called Goos-Haenchen effect (GHE), from the interface between bigyrotropic and nongyrotropic media are theoretically investigated. A some effects of nonlinear (at the second harmonic frequency) reflection of light from magnetic media are considered. The nonlinear optical diffraction in magnetic films with a laminar domain structure and Bloch-type domain walls is investigated for both s and p polarization of incident light. It is shown that the contribution of magnetic domains and domain walls to the nonlinear diffraction can be separated by a polarization analysis of the scattered light. The second harmonic light scattering by the ordered array of magnetic dots is theoretically studied. Polarization analysis of light scattered by uniform magnetized magneti c dots as well as by magnetic dots with the vortex distribution of magnetization is done. The optical second harmonic generation (SHG) from a thin magnetic film on a nonmagnetic substrate is theoretically investigated for both s- and p-polarized incident light. It is shown that the contributions of lattice misfit strain as well as of misfit dislocation strain to the SHG, together with the contribution of magnetization can be separated by a polarization analysis of the scattered light.

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