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Polarisation singularities on plasmonic nanowires

By N.T.M. van der Voort

Abstract

Placing quantum dots at polarisation singularities is expected to allow for direct control over the directionality of the emitted light. Possibly creating a photon driven quantum bit. Here, we investigate the occurrence of polar- isation singularities on plasmonic nanowires with periodic extrusions. We build a 3D model based on a finite element method in order to calculate the electric fields using Floquet periodicity and the theory of surface plasmons, propagating along the metal-dielectric interface. To validate our model we first show qualitative agreement between results ob- tained with the 3D model and earlier 2D models of a straight wire. Secondly we develop a piece of mathematics that allows for determining polarisation singularities independent of a reference frame and we show that polarisa- tion singularities exist on plasmonic nanowire with periodic extrusions at the surface of the metal

Topics: Plasmonics, polarisation singularities, periodic plasmonic nanowires
Year: 2013
OAI identifier: oai:dspace.library.uu.nl:1874/283702
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