Print Email Facebook Twitter Plasmon switching: Observation of dynamic surface plasmon steering by selective mode excitation in a sub-wavelength slit Title Plasmon switching: Observation of dynamic surface plasmon steering by selective mode excitation in a sub-wavelength slit Author Raghunathan, S.B. Gan, C.H. Van Dijk, T. Ea Kim, B. Schouten, H.F. Ubachs, W. Lalanne, P. Visser, T.D. Faculty Electrical Engineering, Mathematics and Computer Science Department Telecommunications Date 2012-06-22 Abstract We report a plasmon steering method that enables us to dynamically control the direction of surface plasmons generated by a two-mode slit in a thin metal film. By varying the phase between different coherent beams that are incident on the slit, individual waveguide modes are excited. Different linear combinations of the two modes lead to different diffracted fields at the exit of the slit. As a result, the direction in which surface plasmons are launched can be controlled. Experiments confirm that it is possible to distribute an approximately constant surface plasmon intensity in any desired proportion over the two launching directions. We also find that the anti-symmetric mode generates surface plasmons more efficiently than the fundamental symmetric mode. To reference this document use: http://resolver.tudelft.nl/uuid:c710b8c0-b80c-4c26-b35d-b09558faa13b DOI https://doi.org/10.1364/OE.20.015326 Publisher Optical Society of America ISSN 1094-4087 Source http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-14-15326 Source Optics Express, 20 (14), 2012 Part of collection Institutional Repository Document type journal article Rights © 2012 Optical Society of America Files PDF Raghunathan_2012.pdf 1.03 MB Close viewer /islandora/object/uuid:c710b8c0-b80c-4c26-b35d-b09558faa13b/datastream/OBJ/view