Bessel beams through hBN crystals reach 0.82 spin-orbit conversion efficiency for optical vortex generation, exceeding the 0.5 theoretical limit for Gaussian inputs.
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Near-unity efficiency optical vortex generation in van der Waals materials
Bessel beams through hBN crystals reach 0.82 spin-orbit conversion efficiency for optical vortex generation, exceeding the 0.5 theoretical limit for Gaussian inputs.