A. V. Kozar

Investigation of the trajectories of a magnetized particle in the equatorial plane of a magnetic dipole

The movement of a magnetized particle in the equatorial plane of a magnetic dipole is investigated. Analysis and classification of trajectory types for such particles are made. It is shown that eight different trajectory types are possible, which depend on the particle’s energy and on the orientation of its magnetic dipole moment. This permits the use of an axial magnetic field to move a magnetized particle in any point of the magnetic equatorial plane.

Diffraction of a Gaussian light beam at the right-angle edges of a plate and the interference pattern in the shadow region

A circular Gaussian beam of monochromatic laser radiation is normally incident to the plane of a right-angle thin metal plate and diffracts at the edges of the plate angle. It is revealed that two main fragments of a composite diffracted wave with cylindrical wave fronts whose axes are mutually orthogonal occur and interfere with each other in the shadow region behind the plate. This is found from the characteristic interference pattern on a flat screen behind the plate. This interference pattern consists of intensive curvilinear, wedge-shaped bands that are located symmetrically in pairs with respect to the bisector of the direct central angle of the circular shadow sector.

Transient reflectivity of pulse signals from layered structures with losses

Experimental, analytical, and numerical investigation of the transient reflectivity of the electromagnetic pulse from an antireflective structure with losses is conducted. Analytical investigations have shown that the envelope of the amplitude modulated reflected signal changes significantly even under small losses. The experimental, analytical, and numerical results are analyzed and compared.

The Effects of Vacuum Nonlinear Electrodynamics in a Electric Dipole Field

The non-linear action of an electric dipole field on the propagation of electromagnetic waves within the eikonal approximation of parameterized post-Maxwellian vacuum electrodynamics is investigated. The angles of the nonlinear electrodynamics curvature of rays, along which electromagnetic pulses propagate, and the time difference of the propagation of normal waves from the electromagnetic radiation source to the receiver are calculated.

Secondary diffraction of diffracted Gaussian beam of laser radiation

The diffraction of a narrow Gaussian beam of laser radiation on mutually perpendicular edges of crossed, superimposed sharp wedge-shaped blades (safety razors) has been studied. The diffraction pattern observed on a flat screen behind the blades comprises a very bright central spot, which exhibits the structure of a “light network” with rectangular cells, and four groups of narrow bright bands that expand from the central spot toward the periphery and form a rectangular cross. The spatial frequency of light-field modulation on the screen can be controlled by varying the distance from the blades to screen.

Optical properties of aperiodic thin-layer structures: Effective refractive index

Simple analytical expressions for the effective refractive index of an aperiodic thin-layer structure have been obtained and analyzed. The expressions correctly describe the optical properties of the structure in a wide range of wavelengths. The optical properties that are general for the structures of this class have been established. The validity of the results is shown by a numerical experiment.

Local transverse diffusion of light due to laguerre laser beam diffraction

When shading half of a Laguerre laser light beam with a semi-infinite metal screen with an imperfect edge the effect of fine structure formation in a transverse diffusion of “half-beam” light and its further evolution in the process of half-beam space propagation were experimentally revealed.

Edge diffraction of a Laguerre light beam

The phenomenon of transverse diffusion of ray amplitude along two principal orthogonal directions on the cylindrical surface of a diffracted boundary wave is observed in the diffraction of a Laguerre laser beam by the straight sharp edge of a planar safety-razor blade.

Transversely diffusive edge speckles

A new type of speckles arising upon the diffraction of a laser beam at a sharp metal blade with an imperfect edge is discovered. The phenomenon is explained in terms of the Leontovich gradient mechanism.