Figure 2.

Comparison of SLR with LSPR. (a) Extinction cross section calculated per particle. (b) Dipole sum for a square array (having period 480 nm) of silver disks (h = 30 nm, d = 120 nm). Light is incident normally, using linearly polarized light where the electric field is parallel to the array’s y-axis. Index matching was used, with an immersion oil having n = 1.515; thus, the diffraction edge occurs at 727 nm. The intersection of the real parts of 1/α and S is indicated by dashed lines in (a) and (b). Reproduced and adapted with permission from ref (83). Copyright 2014 American Physical Society.