We analyze the interaction between a nanoscale emitter and a photonic funnel with a metamaterial core and demonstrate that funnel structures can significantly improve out-coupling efficiency of light as compared with their planar plasmonic counterparts.
Photonic funnels have been demonstrated as a flexible platform to confine light to deep subwavelength spatial areas. Here we consider the utility of this platform to provide temporal, as well as spatial, light shaping.
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