Dynamic surface plasmon patterns generated by reconfigurable “cogwheel-shaped” beams

Hu, Z. J.; Yuan, X.-C.; Zhu, S. W.; Yuan, G. H.; Tan, P. S.; Lin, J.; Wang, Q.
November 2008
Applied Physics Letters;11/3/2008, Vol. 93 Issue 18, p181102
Academic Journal
A method for generating and controlling dynamic surface plasmon patterns by highly focused “cogwheel-shaped” beams is studied theoretically and experimentally. The “cogwheel” beams are formed by collinear superposition of two Laguerre–Gaussian beams with equal but opposite topological charges. It is shown that the patterned surface plasmons can be reconfigured locally with advantages over patterned metallic islands.


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