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, C. Schwob, C. Javaux, B., Dubertret, J.-J. Greffet, P. Senellart, A. Maitre
TL;DR
This paper demonstrates how plasmonic optical patch antennas can be used to control the spontaneous emission rate and radiation pattern of colloidal quantum dots, achieving high directionality and significant emission acceleration.
Contribution
The study provides the first experimental demonstration of deterministic positioning of quantum dots in plasmonic patch antennas to control emission properties.
Findings
Achieved Purcell factor up to 80 for certain dipole orientations
Demonstrated highly directional and vertical radiation patterns
Observed strong acceleration of spontaneous emission depending on antenna size
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 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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