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We propose a method to controllably create free-space, “hard-trapped” two-dimensional fluids with Bessel-Gaussian beam superpositions. We use these systems to experimentally demonstrate several vortex dynamics that resemble dynamics numerically predicted in weakly-interacting quantum fluids. Theoretically, we perform a Bessel-mode decomposition on an initial state containing an arrangement of optical vortices. The experiment is performed using a laser beam that is structured holographically with a spatial light modulator that contains the initial condition of the reconstructed field from the theoretical decomposition. This works allows for the experimental verification of many numerically predicted dynamics or the discovery of new dynamics from experiment.
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Andrew A. Voitiv, Mark E. Siemens, Mark T. Lusk, "Free-space traps of light by light with Bessel beams," Proc. SPIE PC12436, Complex Light and Optical Forces XVII, PC124360P (17 March 2023); https://doi.org/10.1117/12.2648470