META 2021, META'12

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Coupled Optical Vortices in Plasmonic Nanostructures
Svetlana Boriskina, Wonmi Ahn, Bjoern M. Reinhard

Last modified: 2012-01-03


The conversion of free phtotons into localized charge-density oscillations (surface plasmons) enables an efficient delivery of light into nanoscale volumes and facilitates technological innovation in various fields from biosensing to photovoltaics and quantum computing. Conventional plasmonic nanostructures for these applications are designed as nanoscale analogs of radioantennas and waveguides. We have recently introduced an alternative approach for plasmonic nanocircuit engineering that is based on molding the optical powerflow through coupled optical vortices around a landscape of local phase singularities ‘pinned’ to plasmonic nanostructures. In this lecture we will discuss how this approach enables a rational shaping of the near- and far-field spectra of plasmonic nanostructures and we will then review first examples of its experimental implementation and applications in surface enhanced Raman spectroscopy. 


plasmonics, nanophotonics