Self-converging and multiplex optical traps

We demonstrate a simple scheme for generation phase singularities are coupled with the vortex-like orbital flows based on a biaxial crystal. Using a shear interferometer, we were able to create a self-converging trap from the phase singularity, which allows converging and diverging two absorbing particles. Moreover, in a certain interferometer shear mode, we were able to multiplex the trap.

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