Journal article
Enhanced localized fluorescence in plasmonic nanoantennae
NSE-Optofluidics Group, NanoSystemsEngineering Section, Department of Micro- and Nanotechnology, Technical University of Denmark1
NanoSystemsEngineering Section, Department of Micro- and Nanotechnology, Technical University of Denmark2
Department of Micro- and Nanotechnology, Technical University of Denmark3
Metamaterials, Department of Photonics Engineering, Technical University of Denmark4
Department of Photonics Engineering, Technical University of Denmark5
Pairs of gold elliptical nanoparticles form antennae, resonant in the visible. A dye, embedded in a dielectric host, coats the antennae; its emission excites plasmon resonances in the antennae and is enhanced. Far-field excitation of the dye-nanoantenna system shows a wavelength-dependent increase in fluorescence that reaches 100 times enhancement.
Near-field excitation shows enhanced fluorescence from a single nanoantenna localized in a subwavelength area of similar to 0.15 mu m(2). The polarization of enhanced emission is along the main antenna axis. These observed experimental results are important for increasing light extraction from emitters localized around antennae and for potential development of a subwavelength sized laser. (C) 2008 American Institute of Physics.
Language: | English |
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Publisher: | American Institute of Physics |
Year: | 2008 |
ISSN: | 10773118 and 00036951 |
Types: | Journal article |
DOI: | 10.1063/1.2836271 |