Fig. 2: Simulations of circular dichroism for different lattice and resonator symmetries.
From: Chirality encoding in resonant metasurfaces governed by lattice symmetries
a–d Schematic of the lattice symmetries and unit cell configuration for four type of metasurfaces: (a, b) based on C2v bar resonator and (c, d) based on C3v spinner resonator. e–h Corresponding calculated maps of circular dichroism (CD) depending on the excitation wavelength and rotation angle of the resonator. The maps demonstrate angle-equidistant zeroes governed by the interplay of the symmetries of the resonator and the lattice. Horizontal dashed lines mark the β corresponding to symmetry-protected zeroes of CD. The insets on the left of each map shows the section of CD taken at a wavelength marked with black dashed line in each of the (e–h). i–l Unpolarized light transmission spectra calculated for each type of metasurface for β = 0.
