Holographie control of plasmonic structures on the distal facet of multimode optical fibers

Plasmonic fiber tips have attracted considerable research interest from a broad range of perspectives. However, they have been hindered by the turbidity of the fiber combined with the resonant properties of the nanostructures. By applying wavefront shaping, we show that either a sub-region or entire plasmonic structure can be holographically activated. We have applied this method to a wide range of plasmonic structures including periodic nanostructures for EOT and sub-diffraction beam formation and nanoislands for Surface Enhanced Raman Spectroscopy (SERS).