Large single-molecule fluorescence enhancements produced by a bowtie nanoantenna

Kinkhabwala, Anika; Yu, Zongfu; Fan, Shanhui; Avlasevich, Yuri; Müllen, Kläus; Moerner, W. E.

doi:10.1038/nphoton.2009.187

Cited by 1,821 publications

(1,704 citation statements)

References 28 publications

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“…2e for 30 bp dimers shows that rate enhancements close to two orders of magnitude are reproducibly observed. As organic molecules typically feature lifetimes in the nanosecond range, this corresponds to the maximum rate enhancements that can be unambiguously estimated using time-correlated single photon counting (~10 ps lifetimes) 10 . By shortening the DNA spacer or choosing a molecule emitting at the longitudinal dimer resonance (~550 nm in these experimental conditions) 14 , it would be possible to synthesize, but not to analyse, nanoantennas with three orders of magnitude decay rate enhancements.…”

Section: Dna-driven Nanoparticle Assemblymentioning

confidence: 99%

“…1c and d (a photobleaching step confirms the emitter singularity). To estimate the emission rate, we convolute the IRF with a monoexponential decay and fit the fluorescence data 10 as shown in Fig. 1e for an ATTO647N molecule in a 30 bp dimer.…”

Section: Dna-driven Nanoparticle Assemblymentioning

confidence: 99%

“…Efficient interaction between a molecule and a nanoantenna was only observed by randomly depositing SMs on e-beam-fabricated bow-tie antennas 10 . Lithography was used to position quantum dots next to gold Yagi-Uda antennas 11 or diamond colour centres in silver nano-apertures 12 ; but the position uncertainty of the emitting transition dipole is several tens of nanometres.…”

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Accelerated single photon emission from dye molecule-driven nanoantennas assembled on DNA

et al. 2012

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A photon interacts efficiently with an atom when its frequency corresponds exactly to the energy between two eigenstates. But at the nanoscale, homogeneous and inhomogeneous broadenings strongly hinder the ability of solid-state systems to absorb, scatter or emit light. By compensating the impedance mismatch between visible wavelengths and nanometre-sized objects, optical antennas can enhance light-matter interactions over a broad frequency range. Here we use a DnA template to introduce a single dye molecule in gold particle dimers that act as antennas for light with spontaneous emission rates enhanced by up to two orders of magnitude and single photon emission statistics. Quantitative agreement between measured rate enhancements and theoretical calculations indicate a nanometre control over the emitterparticle position while 10 billion copies of the target geometry are synthesized in parallel. optical antennas can thus tune efficiently the photo-physical properties of nano-objects by precisely engineering their electromagnetic environment.

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Section: Dna-driven Nanoparticle Assemblymentioning

confidence: 99%

Section: Dna-driven Nanoparticle Assemblymentioning

confidence: 99%

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Accelerated single photon emission from dye molecule-driven nanoantennas assembled on DNA

et al. 2012

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“…Much effort has been spent to prepare nanostructures that generate higher fluorescence enhancements. For example, bowtie nanoantennas consisting of two triangular nanoparticles with a small gap were used by the groups of Moerner 16 and Hecht 17 and provide fluorescence enhancements of up to 1300 for weak emitters. 16 More recent examples include directional Yagi-Uda and corrugated nanoantennas by the groups of Van Hulst 18 and Wenger.…”

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confidence: 99%

Resonant Plasmonic Enhancement of Single-Molecule Fluorescence by Individual Gold Nanorods

et al. 2014

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Enhancing the fluorescence of a weak emitter is important to further extend the reach of single-molecule fluorescence imaging to many unexplored systems. Here we study fluorescence enhancement by isolated gold nanorods and explore the role of the surface plasmon resonance (SPR) on the observed enhancements. Gold nanorods can be cheaply synthesized in large volumes, yet we find similar fluorescence enhancements as literature reports on lithographically fabricated nanoparticle assemblies. The fluorescence of a weak emitter, crystal violet, can be enhanced more than 1000-fold by a single nanorod with its SPR at 629 nm excited at 633 nm. This strong enhancement results from both an excitation rate enhancement of ∼130 and an effective emission enhancement of ∼9. The fluorescence enhancement, however, decreases sharply when the SPR wavelength moves away from the excitation laser wavelength or when the SPR has only a partial overlap with the emission spectrum of the fluorophore. The reported measurements of fluorescence enhancement by 11 nanorods with varying SPR wavelengths are consistent with numerical simulations.

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“…Nanometallic antennas have also been used to tailor the excitation and emission processes of nearby fluorescent molecules or quantum dots (QDs) [3][4][5][6] . Strong local field concentration near illuminated metallic nanostructures is known to result in large excitation enhancements of quantum emitters 7 . Moreover, such particles can substantially enhance the local density of optical states and control the flow of light out of the emitter into free space.…”

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confidence: 99%

Plasmonic beaming and active control over fluorescent emission

Jun

Huang²,

Brongersma³

2011

Nat Commun

189

184

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nanometallic optical antennas are rapidly gaining popularity in applications that require exquisite control over light concentration and emission processes. The search is on for highperformance antennas that offer facile integration on chips. Here we demonstrate a new, easily fabricated optical antenna design that achieves an unprecedented level of control over fluorescent emission by combining concepts from plasmonics, radiative decay engineering and optical beaming. The antenna consists of a nanoscale plasmonic cavity filled with quantum dots coupled to a miniature grating structure that can be engineered to produce one or more highly collimated beams. Electromagnetic simulations and confocal microscopy were used to visualize the beaming process. The metals defining the plasmonic cavity can be utilized to electrically control the emission intensity and wavelength. These findings facilitate the realization of a new class of active optical antennas for use in new optical sources and a wide range of nanoscale optical spectroscopy applications.

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Large single-molecule fluorescence enhancements produced by a bowtie nanoantenna

Cited by 1,821 publications

References 28 publications

Accelerated single photon emission from dye molecule-driven nanoantennas assembled on DNA

Accelerated single photon emission from dye molecule-driven nanoantennas assembled on DNA

Resonant Plasmonic Enhancement of Single-Molecule Fluorescence by Individual Gold Nanorods

Plasmonic beaming and active control over fluorescent emission

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