Enhancement of single-molecule fluorescence using a gold nanoparticle as an optical nanoantenna.
By S. Kühn, U. Håkanson, L. Rogobete, Vahid Sandoghdar. Physical Review Letters, 2006
1,385 citations recorded by the source corpus.
We investigate the coupling of a single molecule to a single spherical gold nanoparticle acting as a nanoantenna. Using scanning probe technology, we position the particle in front of the molecule with nanometer accuracy and measure a strong enhancement of more than 20 times in the fluorescence intensity simultaneous to a 20-fold shortening of the excited state lifetime. Comparisons with three-dimensional calculations guide us to decipher the contributions of the excitation enhancement, spontaneous emission modification, and quenching. Furthermore, we provide direct evidence for the role of the particle plasmon resonance in the molecular excitation and emission processes.
Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/0a8df3c56a2344e65eedd7326b9421b7e0966321
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In Biomedical Engineering
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Plasmonic materials for energy: From physics to applications (2013, background): “al to the DOS of the free space, but can be enhanced via the Purcell effect [65] if additional high-DOS decay channels are introduced. High-momentum SP modes provide such high-capacity decay channels [49, 66, 67, 68, 69]. The radiative rate of a dipole can be enhanced by the Purcell factor, which is”
- Plasmonics for near-field nano-imaging and superlensing (2009, background): “The measured intensity of fluorescence is therefore a trade-off between quenching and enhancemen”
- Nonlinear plasmonics with gold nanoparticle antennas (2009, background): “The characteristic lifetime of two-photon excited luminescence is shorter than 10 ps [9] whereas typical fluorescence lifetimes of molecules are at least ten times longer, even in the presence of the optical antenna [27].”
- Enhancement of light extraction from light emitting diodes (2011, background): “Probably the simplest configuration of this concept is the enhancement of the emission of the single molecule by the gold particle placed in the near vicinity [642–645] or of the dye–polymer mixture [646]; the optical properties of metal nanoparticles strongly depend on their size, their shape and t”
- Nanoantennas for visible and infrared radiation (2011, methodology): “These probes were used to image single molecules at a resolution smaller than the sphere diameter but compatible with the expected extent of the localized field [86, 87].”