Abstract

As the fundamental information of light, phase, and polarization have been widely studied and applied. We find that the linear polarization-gradient phase coupling can occur in a specific condition, i.e., the linear polarization of an incident beam with uniform phase can be converted under the tight focusing to the nearly linear gradient phase of the output beam. In this article we have proved both theoretically and experimentally that a tightly focused linearly polarized beam with uniform phase can be converted into a beam with gradient phase, and the tightly focused beam has been found to transport particles automatically owing to the possession of the gradient phase force.

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