Generation and Tunable Focal Shift of the Hybridly Polarized Vector Optical Fields with Parabolic Symmetry

Based on a parabolic coordinate system,we theoretically design and experimentally generate hybridly polarized vector optical fields with parabolic symmetry of the first and second kinds,which can further enrich the family of vector optical fields.The wavefront of this new-kind vector optical field contains circular,elliptic and linear polarizations,and the polarizations can keep the same or change along the parabolic curves.Then we present the realization of tunable focal shift with the hybridly polarized vector optical field,and show a specific law of the focal shift of the focused hybridly polarized vector optical field with the parabolic symmetry.We hope these results can provide a new way to flexibly modulate focal fields,which can be applied in realms such as optical machining,optical trapping and information transmission.

Redistributing the energy flow of tightly focused ellipticity-variant vector optical fields

The redistribution of the energy flow of tightly focused ellipticity-variant vector optical fields is presented.We theoretically design and experimentally generate this kind of ellipticity-variant vector optical field, and further explore the redistribution of the energy flow in the focal plane by designing different phase masks including fanlike phase masks and vortex phase masks on them. The flexibly controlled transverse energy flow rings of the tightly focused ellipticity-variant vector optical fields with and without phase masks can be used to transport multiple absorptive particles along certain paths, which may be widely applied in optical trapping and manipulation.

Tunable azimuthally non-uniform orbital angular momentum carried by vector optical fields

Orbital angular momentum(OAM), as a fundamental parameter of a photon, has attracted great attention in recent years. Although various properties and applications have been developed by modulating the OAM of photons, there is rare research about the non-uniform OAM. We propose and generate a new kind of continuously tunable azimuthally non-uniform OAM for the first time, to the best of our knowledge, which is carried by a hybridly polarized vector optical field with a cylindrically symmetric intensity profile and a complex polarization singularity. We also present the perfect vector optical field carrying non-uniform OAM with a fixed radius independent of topological charges, which can propagate steadily without radial separation, solving the problem of the unsteady propagation due to the broadened OAM spectrum of the non-uniform OAM. This new kind of tunable non-uniform OAM with a cylindrical symmetric intensity profile, complex polarization singularity, and propagation stability enriches the family of OAMs and can be widely used in many regions such as optical manipulation, quantum optics, and optical communications.