Figure 2.

(a) Illustration of a single ramp-shaped chiral plasmonic nanostructure and its geometrical parameters. (b)–(g) The near-field maps at the three major resonances of the structure: 605 nm; 655 nm; and 825 nm for LCP and RCP incident light. Calculations were performed for a 2D periodic array of ramp-shaped structures, with $r=w=100$ nm, $t=200$ nm and a period length of $p=600$ nm. Results for the electric field amplitude are normalized to $E_0=1.76\times {10}^9$. Reproduced with permission from ref. [49]. Copyright 2019 American Chemical Society.