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Metasurfaces are 2D engineered structures with subwavelength granularity, offering a wide range of opportunities to tailor the impinging wavefront. However, fundamental limitations on their efficiency in wave transformation, associated with their deeply subwavelength thickness, challenge their implementation in practical application scenarios. Here, it is shown how the coherent control of metagratings...
Coherent control of metagratings through multiple wave excitations provides new opportunities for highly reconfigurable broadband metasurfaces with large diffraction efficiency, beyond the limitations of conventional approaches. In article number 2002341, Ming Kang, Xueqian Zhang, Alex Krasnok, Jiaguang Han, Andrea Alù, and co‐workers discover that energy distribution between the diffraction orders...
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