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- W4386859639 abstract "Two-dimensional chiral metasurfaces seem to contradict Lord Kelvin's geometric definition of chirality since they can be made to coincide by performing rotational operations. Nevertheless, most planar chiral metasurface designs often use complex meta-atom shapes to create flat versions of three-dimensional helices, although the visual appearance does not improve their chiroptical response but complicates their optimization and fabrication due to the resulting large parameter space. Here we present one of the geometrically simplest two-dimensional chiral metasurface platforms consisting of achiral dielectric rods arranged in a square lattice. Chirality is created by rotating the individual meta-atoms, making their arrangement chiral and leading to chiroptical responses that are stronger or comparable to more complex designs. We show that resonances depending on the arrangement are robust against geometric variations and behave similarly in experiments and simulations. Finally, we explain the origin of chirality and behavior of our platform by simple considerations of the geometric asymmetry and gap size." @default.
- W4386859639 created "2023-09-20" @default.
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- W4386859639 date "2023-09-19" @default.
- W4386859639 modified "2023-10-16" @default.
- W4386859639 title "Two-Dimensional Chiral Metasurfaces Obtained by Geometrically Simple Meta-atom Rotations" @default.
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- W4386859639 doi "https://doi.org/10.1021/acs.nanolett.3c02168" @default.
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