In this paper we discuss and demonstrate the trapping and manipulating the particles by three types of single traps
(Gaussian trap, vortex trap and "vortex less" trap), which are formed by one optical device. Experimental results are
presented.
Interrelation of the fine structure of the vector field and its averaged polarization characteristics is considered. It is
shown that space averaged Stokes parameters are defined by dispersion of the phase difference in its saddle points. The
dispersion of phase difference and dimension of areas with considerable polarization changes are defied by the
averaged space between the nearest adjacent component vortices of the same sign. The results of computer simulation
and experimental investigation are presented. Good correlation between these results is observed.
The features of e m inhomogeneous polarized field, which concern an angular momentum, are considered. It is shown
that the e-m field produced by differently polarized optical beams may carry orbital angular momentum. Such angular
momentum arises in field area with the point of circular polarization (C -point). Superposition of relatively simple
orthogonally polarized beams is considered. Experimental results of particles capturing by such focused beam are
presented. On the other hand, in the vicinity of s -contour (field line with linear polarization) spin angular momentum
vanishes. At the same time such angular momentum appears when superposition of beams with different wave-length is
considered.
An interferometric technique for analysis of a polarization singular skeleton (s-contours and C-points) of an optical vector field is elaborated. It was shown that complete characteristics of C-points and s-contours may be reconstructed from interferometric data. Some examples of elaborated interferometric technique application to the analysis of randomly polarized speckle-fields singularities are presented.
Interrelations of the fine structure of the vector field and its averaged polarization characteristics are considered. It is shown that space averaged Stokes parameters are defined by dispersion of the phase difference in its saddle points. The dispersion of phase difference and dimension of areas with considerable polarization changes are related with the averaged space between the nearest adjacent component vortices f the same sign. The results of computer simulation and experimental modeling are presented.
The possibility of the self-converging optical traps formation on the base of elementary polarization singularities is considered. The principles of the formation of s-contours with optimal characteristics are formulated. The technique of creating of such field based on the computer-generated holograms is proposed. The results of computer simulation and experimental modeling are presented.
The interferometric technique of analysis of polarization singular skeleton (s contours and c points) of vector field is elaborated. It was shown that complete characteristics of c points and s contours may be reconstructed from interferometric data. The examples of elaborated interferometric technique application to the polarization speckle-field analysis are presented.
Novel approach for the analysis of singularities in vector fields has been proposed. The essence of this approach is scalar consideration of the phase vortices at the orthogonal field components. The new type of vortices are introduced, namely the phase-difference vortices. The sign principle for the phase-difference vortices is formulated. An interconnection between the characteristics of the complete system of phase vortices associated with orthogonal field components, the behavior of an azimuth of a linearly polarized electrical field at an s-contour, and the polarization singularities, dislocations is established. The feasibility for comprehensive estimation of the characteristics of temporal singularities based on the measurement of the stationary field parameters is shown both theoretically and experimentally. Some elementary polarization situations are analyzed on the basis of the developed approach. The obtained results are extended to the case of quasi-uniform in polarization fields.
Polarization structure of vectoral optical fields is investigated. Interconnection among polarization structure of the field and the vortex networks at its orthogonal components is established.
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