paper

Observation of quantum interference in the plasmonic Hong-Ou-Mandel effect

arXiv:1402.0813 · doi:10.1103/PhysRevApplied.1.034004

Abstract

We report direct evidence of the bosonic nature of surface plasmon polaritons (SPPs) in a scattering-based beamsplitter. A parametric down-conversion source is used to produce two indistinguishable photons, each of which is converted into a SPP on a metal-stripe waveguide and then made to interact through a semi-transparent Bragg mirror. In this plasmonic analog of the Hong-Ou-Mandel experiment, we measure a coincidence dip with a visibility of 72%, a key signature that SPPs are bosons and that quantum interference is clearly involved.

5 pages, 3 figures

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