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Surface plasmon resonance

About: Surface plasmon resonance is a research topic. Over the lifetime, 24909 publications have been published within this topic receiving 810976 citations. The topic is also known as: Surface plasmon resonance & SPR (technology).


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Journal ArticleDOI
TL;DR: An experimental demonstration of strong coupling between a surface plasmon propagating on a planar silver thin film and the lowest excited state of CdSe nanocrystals, akin to those studied in cavity quantum electrodynamics, offering the possibility to study the regime of strong light-matter coupling in semiconductor nanocry crystals under easily accessible experimental conditions.
Abstract: We present an experimental demonstration of strong coupling between a surface plasmon propagating on a planar silver thin film and the lowest excited state of CdSe nanocrystals Attenuated total reflection measurements demonstrate the formation of plasmon−exciton mixed states, characterized by a Rabi splitting of ∼112 meV at room temperature Such a coherent interaction has the potential for the development of nonlinear plasmonic devices, and furthermore, this system is akin to those studied in cavity quantum electrodynamics, thus offering the possibility to study the regime of strong light−matter coupling in semiconductor nanocrystals under easily accessible experimental conditions

271 citations

Journal ArticleDOI
TL;DR: It is shown that hot electron flow generated on a gold thin film by photon absorption (or internal photoemission) is amplified by localized surface plasmon resonance.
Abstract: A continuous flow of hot electrons that are not at thermal equilibrium with the surrounding metal atoms is generated by the absorption of photons. Here we show that hot electron flow generated on a gold thin film by photon absorption (or internal photoemission) is amplified by localized surface plasmon resonance. This was achieved by direct measurement of photocurrent on a chemically modified gold thin film of metal-semiconductor (TiO2) Schottky diodes. The short-circuit photocurrent obtained with low-energy photons is consistent with Fowler’s law, confirming the presence of hot electron flows. The morphology of the metal thin film was modified to a connected gold island structure after heating such that it exhibits surface plasmon. Photocurrent and optical measurements on the connected island structures revealed the presence of a localized surface plasmon at 550 ± 20 nm. The results indicate an intrinsic correlation between the hot electron flow generated by internal photoemission and localized surface p...

271 citations

Journal ArticleDOI
TL;DR: Yen-Hsun Su et al. as discussed by the authors showed that the efficiency of a plasmon-sensitized solar cell can be improved by depositing gold nanoparticles on the cell's surface.
Abstract: Layer-by-layer gold nanoparticles are used to generate photocurrent in an environmentally-friendly plasmon-sensitized solar cell towing to surface plasmon resonance. The efficiency of the photoelectric conversion of gold nanoparticle layers is increased as the intensity of surface plasmon resonance increases. We also explain the experimental results by modeling the phenomenon of charge separation and photocurrent formation, and the relationship between surface plasmon resonance and photocurrent formation, which has potential application in plasmon-sensitized solar cells and plasmonic solar cells in the future. The efficiency of a plasmon-sensitized solar cell can be improved by depositing gold nanoparticles on the cell’s surface. Achieving a high energy-conversion efficiency—the percentage of incident solar energy converted into electrical energy—is the primary goal for any solar cell technology. Yen-Hsun Su and colleagues at National Dong Hwa University in Hualien have now demonstrated that depositing multiple layers of gold nanoparticles on the surface of a plasmon-sensitized solar cell increases the amount of light scattered across its surface, boosting the amount of light absorbed and thus improving its efficiency. Once optimized, such gold-covered plasmonic solar cells have the potential to replace the more popular dye-sensitized solar cells.

270 citations

Journal ArticleDOI
TL;DR: In this article, the authors focus on the narrow homogeneous line width of only 180 meV and show that the particle plasmon resonance responds more sensitively to changes in the environment, the biological spectral window is accessible and the scattering spectra show sharper resonances.
Abstract: Molecular sensors based on scattering spectroscopy of single gold nanoparticles can be improved three-fold by the use of gold nanoshells instead of solid gold nanoparticles. The particle plasmon resonance responds more sensitively to changes in the environment, the biological spectral window is accessible, and the scattering spectra show sharper resonances. In particular, we focus our discussion on the narrow homogeneous line width of only 180 meV.

270 citations

Journal ArticleDOI
TL;DR: Salmonella and Listeria were detected in real time using a surface plasmon resonance (SPR) sensor based on prism excitation of surface plasmons and spectral interrogation.
Abstract: Salmonella enteritidis and Listeria monocytogenes were detected in real time using a surface plasmon resonance (SPR) sensor based on prism excitation of surface plasmons and spectral interrogation. The respective antibodies against the pathogens were immobilized on the gold sensor surface as a covalently crosslinked double-layer or covalently bound on a crosslinked albumin layer. Salmonella and Listeria could be detected by the sensor at concentrations down to 10 6 cell/ml. The sensor sensitivity was comparable with that of standard ELISA in which the same antibodies were used.

270 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20231,320
20222,684
20211,240
20201,422
20191,498
20181,528