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arXiv · 1402.0813

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

G. Di Martino·Y. Sonnefraud·M. S. Tame·S. Kéna-Cohen·F. Dieleman·Ş. K. Özdemir·M. S. Kim·S. A. Maier
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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.

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G. Di Martino, Y. Sonnefraud, M. S. Tame, S. Kéna-Cohen, F. Dieleman, Ş. K. Özdemir, M. S. Kim, S. A. Maier. 2014-02-04. Observation of quantum interference in the plasmonic Hong-Ou-Mandel effect. https://doi.org/10.1103/physrevapplied.1.034004

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