Patent ID: 9696603
Date: 2017-07-04
CPC Classifications: G02B,G02F

Claim:
1. A plasmonic switching device comprising: a resonant cavity formed between surfaces, one of said surfaces comprising a plasmonic system operable to support at least one plasmonic mode; an electromagnetic radiation feed arranged to couple electromagnetic radiation into said resonant cavity and said at least one plasmonic mode; wherein said resonant cavity is arranged to be switchable between: a first state in which said resonant cavity has an operational characteristic selected to allow resonance of said electromagnetic radiation at a frequency of said at least one plasmonic mode such that excitation of said at least one plasmonic mode is inhibited in said plasmonic system; and a second state in which said operational characteristic of said resonant cavity is adjusted to inhibit resonance of said electromagnetic radiation at a frequency of said at least one plasmonic mode such that said at least one plasmonic mode is excited in said plasmonic system.