Spectral tunability of a plasmonic antenna with a dielectric nanocrystal

Physics – Condensed Matter – Mesoscale and Nanoscale Physics

Scientific paper

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10 pages, 3 figures

Scientific paper

We show that the positioning of a nanometer length scale dielectric object, such as a diamond nanocrystal, in the vicinity of a gold bowtie nanoantenna can be used to tune the plasmonic mode spectrum on the order of a linewidth. We further show that the intrinsic luminescence of gold enhanced in the presence of nanometer-scale roughness couples efficiently to the plasmon mode and carries the same polarization anisotropy. Our findings have direct implications for cavity quantum electrodynamics related applications of hybrid antenna-emitter complexes.

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