META Conference, META'12

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Close encounters between nanoantennas: Bridging quantum and classical plasmonics
J. Aizpurua

Last modified: 2012-01-29


Plasmonic nanoantennas change dramatically their optical response when their constituent nanostructures are closely located in subnanometer proximity. In this regime, electron tunneling across a cavity between metallic surfaces is triggered out, producing an emergence and redistribution of antenna modes. A collapse of the near-field at the cavity is also associated with the tunneling events. We present a quantum corrected model (QCM) that allows for including these quantum effects in a classical description of the optical response of large-scale plasmonic systems. Based on this model, it is possible to study the effect of tunneling in realistic plasmonic configurations such as in plasmonic dimers or in bowtie antennas.