Extended Data Fig. 2: Gradient Metasurfaces for Continuous Tuning of γrad.
From: Optical control of resonances in temporally symmetry-broken metasurfaces
(a) Single optical image of the substrate containing side by side the w1 gradient (left) and the l2 gradient metasurface (right). (b) SEM images of individual unit cells taken at 10 µm intervals along the x-axis for the w1 gradient, starting from 0 to 100 µm. (c) Equivalent SEM images along the l2 gradient. (d) Angled SEM image of the l2 gradient around the RSP-BIC condition.
