Formation of particle chains in the enhanced electric field above a thin gold film supporting a SPP with increasing laser power (a) 20 mW, (b) 40 mW, (c) 50 mW and (d) 100 mW.
Reprinted figure from Garcés-Chévez et al., Phys. Rev. B 73, 085417. Copyright (2006) by the American Physical Society.
Fig. 22.4 — Optical binding induced by surface plasmons