4.5 Article

Transmissive angle-multiplexed meta-polarizer based on a multilayer metasurface

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CHINESE OPTICS LETTERS
卷 21, 期 2, 页码 -

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CHINESE LASER PRESS
DOI: 10.3788/COL202321.023603

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metasurfaces; angular dispersion; multifunctional meta-device; polarization modulation

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This study presents the design and fabrication of a multilayer metasurface-based microwave transmissive angle-multiplexed meta-polarizer, which exhibits distinct angle-dependent transmissive responses under different polarizations. The experimental results are well-matched with numerical simulations and theoretical analyses.
Metasurfaces have exhibited great capabilities to control electromagnetic waves, and many multifunctional metasurfaces were recently proposed. However, although angle-multiplexed meta-devices were successfully realized in reflection geom-etries, their transmission-mode counterparts are difficult to achieve due to the additional requirements. Here, we design and fabricate a transmissive angle-multiplexed meta-polarizer in the microwave regime based on a multilayer metasurface. Coupled-mode-theory analyses reveal that the device exhibits distinct angle-dependent transmissive responses under exci-tations with different polarizations, and such differences are further enhanced by multiple scatterings inside the device. Microwave experimental results are in good agreement with numerical simulations and theoretical analyses.

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