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arxiv: 1209.6566 · v1 · pith:QHPOPZRLnew · submitted 2012-09-28 · 🪐 quant-ph · cond-mat.other· physics.optics

Controlling spontaneous emission with plasmonic optical patch antennas

C. Belacel , B. Habert , F. Bigourdan , F. Marquier , J.-P. Hugonin , S. Michaelis de Vasconcellos , X. Lafosse , L. Coolen
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C. Schwob C. Javaux B. Dubertret J.-J. Greffet P. Senellart A. Maitre
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classification 🪐 quant-ph cond-mat.otherphysics.optics
keywords antennaemissionpatchspontaneousemittersgoldpatternplasmonic
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We experimentally demonstrate the control of the spontaneous emission rate and the radiation pattern of colloidal quantum dots deterministically positioned in a plasmonic patch antenna. The antenna consists of a thin gold microdisk 30 nm above a thick gold layer. The emitters are shown to radiate through the entire patch antenna in a highly directional and vertical radiation pattern. Strong acceleration of spontaneous emission is observed, depending of the antenna size. Considering the double dipole structure of the emitters, this corresponds to a Purcell factor up to 80 for dipoles perpendicular to the disk.

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