The ring: a leitmotif in plasmonics.
An interesting paper in this issue describes an experiment that is an optical analogue of the "quantum corral" on metal surfaces constructed and observed using scanning tunneling microscopy more than a decade ago. In this Perspective, the mechanism underlying the confinement and manipulation of light in metallic nanorings and related structures are discussed, with an emphasis on recent results.
Nordlander
Peter
P
Laboratory for Nanophotonics, Department of Physics and Astronomy, Rice University, Houston, Texas 77005-1892, USA. nordland@rice.edu