Plasmon Coupling in Silver Nanosphere Pairs

Encina, Ezequiel Roberto; Coronado, Eduardo A.

doi:10.1021/jp912096v

Cited by 103 publications

(109 citation statements)

References 51 publications

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“…1 The electromagnetic field surrounding a metallic nanoparticle that has been excited near the plasmon resonance can extend for a considerable distance, and a compelling analogy therefore exists between the plasmon resonance of individual nanoparticles and the wave functions of simple atoms. Similar to the roles of atoms in molecules and solids, metal nanoparticles can assemble to create a diverse range of new plasmonic nanoclusters, 2 including dimers, 3 trimers, 4 quadrumers 5 and tetramers, 6 etc. 7 Each type of plasmonic nanocluster exhibits its own unique set of collective plasmon modes.…”

Section: Introductionmentioning

confidence: 99%

Collective plasmon modes in a compositionally asymmetric nanoparticle dimer

2011

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The plasmon coupling phenomenon of heterodimers composed of silver, gold and copper nanoparticles of 60 nm in size and spherical in shape were studied theoretically within the scattered field formulation framework. In-phase dipole coupled σ-modes were observed for the Ag-Au and Ag-Cu heterodimers, and an antiphase dipole coupled π-mode was observed for the Ag-Au heterodimer. These observations agree well with the plasmon hybridization theory. However, quadrupole coupled modes dominate the high energy wavelength range from 357-443 nm in the scattering cross section of the D=60 nm Ag-Au and Ag-Cu heterodimer. We demonstrate for the first time that collective plasmon modes in a compositionally asymmetric nanoparticle dimer have to be predicted from the dipole-dipole approximation of plasmon hybridization theory together with the interband transition effect of the constitutive metals and the retardation effect of the nanoparticle size

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Section: Introductionmentioning

confidence: 99%

Collective plasmon modes in a compositionally asymmetric nanoparticle dimer

2011

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“…This high values found for c may indicate that the non-retarded dipole approximation is not able to describe accurately the plasmon interaction through the Nt walls, at least for thin shells. Recently, Encina and Coronado [43] reached to a similar conclusion for dimers with Ag nanospheres, where they also observe a separation between the "universal curves" between Ag and Au dimers.…”

Section: Numerical Resultsmentioning

confidence: 62%

Metallic Nanotubes Characterization via Surface Plasmon Excitation

et al. 2011

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In this work, we show theoretical results of the behaviour of the extinction cross section as a function of the incident wavelength for metallic nanotubes (Nts) with a 2D core-shell structure. To calculate the optical response of the gold, silver and cooper system, an exact integral formalism is implemented. The method is based on Green's integral theorem, and it allows us to compute the electromagnetic field at any point in space. For a correct description of the constitutive parameters of the metallic shell, we introduce a corrective model for the dielectric function in terms of the shell thickness in the range 1 to 10 nm. In particular, we investigate the features of surface plasmons in metallic Nts, and in the cases of Au and Cu, the mechanisms of the interband transitions play a relevant role. In this paper, we show that a quasi-static approach is not sufficient to account the plasmon-plasmon interaction in Ag Nts. The aim of these studies is to characterize core size and shell thicknesses of the Nts by means of the surface plasmon resonance observed in the far field.

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“…This is rather similar to linear Ag NPs assembles with different longitudinal axis and transverse axis. [23][24][25][26] Interparticle plasmon coupling depends on the size, shape, number, interparticle spacing and dielectric environment of coupled NPs. 27,28 The optical properties of TiO 2 NRCs can be tuned by altering the reaction time of the Ag-TiO 2 NRCs fabrication.…”

Section: -3mentioning

confidence: 99%

Tunable Optical Properties of Ag–TiO₂ Nanorod Composites Based on Interparticle Plasmon Coupling

Zhang

Liu

2016

NANO

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The metal-semiconductor composites with unique optical properties are highly desirable. Here we report that Ag-TiO 2 nanorod composites with two distinctive absorption peaks exhibit tunable plasmon coupling behaviors. The intensity of the long-wave absorption could be enhanced by modifying the geometry of TiO 2 particles, while such absorption is due to the plasmon coupling between the Ag particles. The long-wave absorption bands can be tuned by varying the reaction time and changing the amount of silver acetate. Furthermore, the Ag-TiO 2 composites were also prepared by photochemical reduction method which con¯rmed the previous properties. These results may help to design metal-semiconductor systems with desirable optical properties.

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Plasmon Coupling in Silver Nanosphere Pairs

Cited by 103 publications

References 51 publications

Collective plasmon modes in a compositionally asymmetric nanoparticle dimer

Collective plasmon modes in a compositionally asymmetric nanoparticle dimer

Metallic Nanotubes Characterization via Surface Plasmon Excitation

Tunable Optical Properties of Ag–TiO₂ Nanorod Composites Based on Interparticle Plasmon Coupling

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Plasmon Coupling in Silver Nanosphere Pairs

Cited by 103 publications

References 51 publications

Collective plasmon modes in a compositionally asymmetric nanoparticle dimer

Collective plasmon modes in a compositionally asymmetric nanoparticle dimer

Metallic Nanotubes Characterization via Surface Plasmon Excitation

Tunable Optical Properties of Ag–TiO2 Nanorod Composites Based on Interparticle Plasmon Coupling

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Tunable Optical Properties of Ag–TiO₂ Nanorod Composites Based on Interparticle Plasmon Coupling