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Zhancheng Li - IEEE Xplore Author Profile

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In this letter, we numerically and experimentally demonstrate the highly efficient generation of optical vortex arrays based on the quasi-Talbot effect with a reflective all-dielectric metasurface, which is composed of six identical orbital angular momentum lenses. Six separated and focused optical vortices at the focal plane can be high efficiently generated, and form a vortex array at the defocu...Show More