Enhanced localized fluorescence in plasmonic nanoantennae

Reuben M. Bakker, Hsiao Kuan Yuan, Zhengtong Liu, Vladimir P. Drachev, Alexander V. Kildishev, Vladimir M. Shalaev, Rasmus H. Pedersen, Samuel Gresillon, Alexandra Boltasseva

Research output: Contribution to journalArticlepeer-review

181 Citations (Scopus)

Abstract

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 ∼0.15 μ m2. 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.

Original languageEnglish
Article number043101
JournalApplied Physics Letters
Volume92
Issue number4
DOIs
Publication statusPublished - 2008
Externally publishedYes

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