The paper briefly presents some essential concepts and features of light fields with strong spatial inhomogeneity amplitude, phase, polarization, other parameters. It contains a characterization optical vortices, speckle fields, polarization singularities. A special attention is paid to the field dynamical characteristics (energy, momentum, angular their derivatives), which are considered not only as mechanical attributes but also its meaningful application-oriented descriptive Peculiar in...

We describe experimental results exposing the possibilities of optical crystals, especially anisotropic and birefringent, for creation, control, diagnostics structured light fields with singular extraordinary properties. The efficiency birefringent media is demonstrated purposeful generation beams phase singularities (optical vortices) desirable patterns internal energy flows, in both mono- polychromatic light. On other hand, micro-objects can be used as probing bodies investigation peculiar...

Polarization singularities in paraxial vector optical fields are analyzed terms of the phase complex Stokes scalar fields. Six independent relationships obtained that connect topological charges these on special closed contours with enclosed by contours. These relationships, which have been confirmed experimental data and computer simulations, imply polarization correlations an infinite range.

It is known that internal energy flow in a light beam can be divided into the orbital flow, associated with macroscopic redistribution within beam, and spin originating from instantaneous rotation of field vectors inherent circular or elliptic polarization. In contrast to one, experimental observation constituent seemed problematic because (i) it does not manifest itself visible transformation profile (ii) converts upon tight focusing usually employed for detection by mechanical action on...

Correlation optics provides tools-both conceptual and experimental-for measuring various parameters of an optical field in partial coherence polarization. This area study could enable unique applications for industrial quality control, solid-state physics, medical diagnostics ecological monitoring.

We study the self-action of light in a water suspension absorbing subwavelength particles.Due to efficient accumulation energy, this medium shows distinct non-linear properties even at moderate radiation power.In particular, by means interference two obliquely incident beams, it is possible create controllable phase and amplitude gratings whose contrast, spatial temporal parameters depend on beams' coherence power as well geometry.The grating characteristics are investigated via...

An investigation of the influence an evanescent wave on dynamics motion erythrocytes in blood plasma is presented. Computer simulation moving field and experimental demonstration forecasted substantiate possibility for control position red cells a solution. The range velocities transversal due to action optical force generated determined as function angle illumination cell by linearly polarized with azimuth polarization 45 deg.

The review describes general principles and characteristics of inhomogeneously polarized paraxial optical fields and, especially, the polarization singularities (PSs). Main parameters vector waves are discussed, with emphasis on physical relevance topological distinctiveness PSs. Special features stochastic considered in context PSs’ genericity structural stability. A detailed attention is paid to interrelations between PSs phase scalar formed by orthogonal projections total field, their...

A new approach is proposed for estimating the degree of coherence optical waves.The possibility transformation spatial polarization distribution in measured intensity determining correlation superposing waves, linearly polarized plane incidence, shown.

The statement is substantiated that the experimental estimation of degree intrinsic coherence statistical vector optical fields must include not only measurement visibility interference pattern but also polarization in resulting spatial distribution a field.

Non-spherical dielectric microparticles were suspended in a water-filled cell and exposed to coherent Gaussian light beam with controlled state of polarization. When the polarization is linear, particles trapped at certain off-axial position within cross section. After switching right (left) circular polarization, performed spinning motion agreement angular momentum imparted by field, but they involved an orbital rotation around axis as well, which previous works [Y. Zhao et al, Phys. Rev....

Information on the degree of coherence electromagnetic optical waves that is contained both in intensity modulation and spatial polarization resulting distribution superposing considered. Such an experimental situation often realized near-field optics. The possibility estimation mutual polarized at incidence plane shown.

Based on the Mie theory and incident beam model via superposition of two plane waves, we analyze numerically momentum flux field scattered by a spherical, nonmagnetic microparticle placed within spatially inhomogeneous circularly polarized paraxial light beam. The asymmetry between forward- backward-scattered fluxes in Rayleigh scattering regime appears due to spin part internal energy flow transverse ponderomotive forces exerted dielectric conducting particles different sizes are calculated...

We present the computer simulation results of spatial distribution Poynting vector and illustrate motion micro nanoparticles in spatially inhomogeneously polarized fields. The influence phase relations degree mutual coherence superimposing waves arrangements two-wave four-wave superposition on characteristics microparticle's has been analyzed. prospects studying temporal using proposed approach are made. For first time, possibility diagnostics optical currents liquids caused by polarization...

Micrometer-sized vapor-gas bubbles are formed due to local heating of a water suspension containing absorptive pigment particles 100 nm diameter. The is performed by CW near-infrared (980 nm) laser radiation with controllable power, focused into μm spot within 2 mm layer. By changing the four regimes realized: (1) bubble generation; (2) stable growth existing bubbles; (3) stationary existence and (4) bubbles' shrinkage collapse. This behavior interpreted based on temperature conditions....

The absorption parameters of micro-particles have been associated with the induced spin exerted upon particle, when embedded in a circularly polarized coherent field. rotational speed is theoretically analyzed, showing influence beam parameters, particle and tribological surrounding fluid. theoretical findings adequately confirmed experiments.

Water suspension of light-absorbing nano-sized particles is an example a medium in which non-linear effects are present at moderate light intensities favorable for optical treatment organic and biological objects. We study experimentally the phenomena emerging thin layer such under action inhomogeneous field formed due to Pearcey diffraction pattern near microlens focus. In this high-gradient field, energy absorbed by induces distribution refraction index, results observable self-diffraction...

We propose an optical correlation algorithm illustrating a new general method for reconstructing the phase skeleton of complex fields from measured two-dimensional intensity distribution. The core consists in locating saddle points distribution and connecting such into nets by lines gradient that are closely associated with equi-phase field. This provides partial solution to inverse problem optics commonly referred as problem.

Mechanical action caused by the optical forces connected with canonical momentum density associated local wavevector or Belinfante's spin angular is experimentally verified. The helicity-dependent and helicity-independent determined momenta of different nature open attractive prospects for use structures manipulating minute quantities matter importance in nanophysics, nanooptics nanotechnologies, precision chemistry pharmacology numerous other areas. Investigations this area reveal new,...

The paper summarizes the latest obtained results illustrating rectilinear and rotational motion of micro-objects in a biological environment. Such is stipulated by action optical force, on one hand, special influence toque evanescent wave, other one. reason this unusual presence transverse spin component wave. This feature appears due to method excitation: linearly polarized wave with azimuth polarization 45° at total internal reflection (TIR) interface prism medium used. objects study were...

An interferometric technique for analysis of a polarization singular skeleton (s contours and C points) an optical vector field is elaborated. It was shown that complete characteristics points s may be reconstructed from data. Some examples elaborated application to the randomly polarized speckle-fields singularities are presented.