Onset of charge localisation on coupling multipolar absorption modes in supported metal particles

Lazzari, Rémi; Simonsen, Ingve; Jupille, Jacques

doi:10.1209/epl/i2003-00163-6

Cited by 19 publications

(31 citation statements)

References 37 publications

(57 reference statements)

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“…These studies have been concentrated around spherical or spheroidal particles on top of a substrate, or truncated particles of such shapes on a substrate (used to model a finite contact angle). In this work, the particle-substrate interactions were taken into account to high multipolar order, while the particle-particle interactions were only calculated to dipolar or quadrupolar order, since their main concern was systems of low or finite particle coverage 17,18 .…”

Section: Introductionmentioning

confidence: 99%

Substrate influence on the plasmonic response of clusters of spherical nanoparticles

2011

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The plasmonic response of nanoparticles is exploited in many subfields of science and engineering to enhance optical signals associated with probes of nanoscale and subnanoscale entities. We develop a numerical algorithm based on previous theoretical work that addresses the influence of a substrate on the plasmonic response of collections of nanoparticles of spherical shape. Our method is a real space approach within the quasi-static limit that can be applied to a wide range of structures. We illustrate the role of the substrate through numerical calculations that explore single nanospheres and nanosphere dimers fabricated from either a Drude model metal or from silver on dielectric substrates, and from dielectric spheres on silver substrates.

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Section: Introductionmentioning

confidence: 99%

Substrate influence on the plasmonic response of clusters of spherical nanoparticles

2011

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“…[149,150] Recent experimental observation in supported silver nanoparticles has been consistent with the theoretical predictions. [151][152][153][154] Effect of particle-particle interaction on optical properties of 1D chains There is an intense and growing interest in controlled patterning and alignment of nanostructures from the perspective of their synthesis and unique properties, especially with respect to their excellent optical response. Fig.…”

Section: Mechanistic View Of Spr In Metal Nanoparticlesmentioning

confidence: 99%

Plasmonic Optical Properties and Applications of Metal Nanostructures

2008

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In this review article, we provide an overview of recent research activities in the study of plasmonic optical properties of metal nanostructures with emphasis on understanding the relation between surface plasmon absorption and structure. Both experimental results and theoretical calculations have indicated that the plasmonic absorption strongly depends on the detailed structure of the nanomaterials. Examples discussed include spherical nanoparticles, nanorods, nanowires, hollow nanospheres, aggregates, and nanocages. Plasmon-phonon coupling measured from dynamic studies as a function of particle size, shape, and aggregation state is also reviewed. The fascinating optical properties of metal nanostructures find important applications in a number of technological areas including surface plasmon resonance, surface-enhanced Raman scattering, and photothermal imaging and therapy. Their novel optical properties and emerging applications are illustrated using specific examples from recent literature. The case of hollow nanosphere structures is highlighted to illustrate their unique features and advantages for some of these applications.

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“…However, for our gold films the symmetry of the system is broken due to the supporting substrate, and interface effects such as the formation of image dipoles become important for accurately describing the optical properties of such films. 56,57 Our approach to simply assume an effective dielectric constant for the air voids accounts only partially for the film-substrate interaction.…”

Section: A Effective Medium Theorymentioning

confidence: 99%

Terahertz conductivity of thin gold films at the metal-insulator percolation transition

et al. 2007

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Terahertz time-domain spectroscopy is used to measure the complex conductivity of nanometer-thick gold films evaporated on silicon substrates in the far-infrared spectral region from 0.2 to 2.7 THz. With increasing film thickness a characteristic crossover from an insulating to a conducting state via a percolation transition is observed. Of particular interest is the characteristic non-Drude behavior close to the transition. Whereas effective medium theory is inconsistent with our measurements in this regime, the Drude-Smith model, a generalization of the classical Drude model which incorporates carrier localization through backscattering, provides excellent fits to the observed complex conductivity. Applying this model we observe extreme values for the carrier scattering time at the percolation threshold.

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Onset of charge localisation on coupling multipolar absorption modes in supported metal particles

Cited by 19 publications

References 37 publications

Substrate influence on the plasmonic response of clusters of spherical nanoparticles

Substrate influence on the plasmonic response of clusters of spherical nanoparticles

Plasmonic Optical Properties and Applications of Metal Nanostructures

Terahertz conductivity of thin gold films at the metal-insulator percolation transition

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