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Previous approaches for achieving asymmetric transmission (AT) of light rely on nonreciprocal systems, which are limited to having external bias or high input powers. We show AT from a metasurface comprising dielectric nanogratings on two sides of a silicon nitride membrane. The proposed metagrating provides wideband AT over multiple operational windows, and we demonstrate that such metasurfaces can be realized using both noble plasmonic metals and chalcogenide phase change materials to achieve reconfigurable AT. The proposed structure has various applications, from enhancing efficiencies in photovoltaic systems to tunable isolators and electromagnetic shielding.
Abbas Sheikh Ansari,Ashwin K. Iyer,Behrad Gholipour, andJoshua Perkins
"Reconfigurable asymmetric transmission through all-dielectric metagratings (Conference Presentation)", Proc. SPIE PC12195, Metamaterials, Metadevices, and Metasystems 2022, PC121951E (3 October 2022); https://doi.org/10.1117/12.2633111
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