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. 2013 Apr 10;13(4):1516-21.
doi: 10.1021/nl3046602. Epub 2013 Mar 12.

Controlling spontaneous emission with plasmonic optical patch antennas

C Belacel  1 , B Habert, F Bigourdan, F Marquier, J-P Hugonin, S Michaelis de Vasconcellos, X Lafosse, L Coolen, C Schwob, C Javaux, B Dubertret, J-J Greffet, P Senellart, A Maitre
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Controlling spontaneous emission with plasmonic optical patch antennas

C Belacel et al. Nano Lett. .

Abstract

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 separated from a planar gold layer by a few tens of nanometers thick dielectric 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 on the antenna geometry. 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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