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Thirty years ago, Pierre Coullet et al. proposed that a special optical field exists in laser cavities bearing some similarity with the superfluid vortex. This observation was the first indicator that optical vortices could exist. Since then, optical vortices have been widely studied and have facilitated advances that range from optical tweezers, to quantum entanglement, to nonlinear optics. To commemorate “30 years of optical vortices,” researchers at Tsinghua University and other institutions in China have reviewed the history of optical vortices over the past three decades, beginning with how the concept of optical vortices emerged.
The researchers surveyed the steady refinement of the techniques used to create optical…READ MORE