Controlling Spontaneous Emission with Plasmonic Optical Patch Antennas

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...

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Veröffentlicht in:	Nano letters 2013-04, Vol.13 (4), p.1516-1521
Hauptverfasser:	Belacel, C, Habert, B, Bigourdan, F, Marquier, F, Hugonin, J.-P, Michaelis de Vasconcellos, S, Lafosse, X, Coolen, L, Schwob, C, Javaux, C, Dubertret, B, Greffet, J.-J, Senellart, P, Maitre, A
Format:	Artikel
Sprache:	eng
Schlagworte:	Antennas Applied sciences Collective excitations (including excitons, polarons, plasmons and other charge-density excitations) Colloids - chemistry Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology Dielectrics Dipoles Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Electronics Emitters Engineering Sciences Equipment Design Exact sciences and technology Gold Gold - chemistry Light Materials science Molecular electronics, nanoelectronics Nanocrystalline materials Nanoscale materials and structures: fabrication and characterization Nanostructure Nanostructures - chemistry Nanotechnology Optics Optics and Photonics Patch antennas Photonic Physics Plasmonics Quantum Dots Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Spontaneous emission Surface and interface electron states Surface Plasmon Resonance
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Beschreibung
Zusammenfassung:	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.
ISSN:	1530-6984 1530-6992
DOI:	10.1021/nl3046602