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Chiral metasurfaces can exhibit a strong circular dichroism, but it is limited by the complicated fabrication procedure and alignment errors. Here, a new type of self‐aligned suspended chiral bilayer metasurface with only one‐step electron beam lithography exposure is demonstrated. A significant optical chirality of 221° µm−1 can be realized using suspended metasurfaces with a thickness of 100 nm...
Metasurfaces
A self‐aligned suspended chiral bilayer metasurface via single‐step electron‐beam lithography is reported by Tun Cao, Yan Jun Liu, and co‐workers in article number 2203956. A huge optical chirality of 221° μm−1 is achieved by the free‐standing metasurfaces with overall thickness of 100 nm. The bilayer metasurface demonstrates label‐free discrimination of chiral molecules at zeptomole...