dorsal/arxiv
View SchemaCoherent Light Scattering from Semicontinuous Silver Nanoshells Near the Percolation Threshold
| Authors | Charles A. Rohde, Keisuke Hasegawa, Miriam Deutsch |
|---|---|
| Categories | |
| ArXiv ID | physics/0508208 |
| URL | https://arxiv.org/abs/physics/0508208 |
| DOI | 10.1103/PhysRevLett.96.045503 |
Abstract
We report on measurements of visible extinction spectra of semicontinuous silver nanoshells grown on colloidal silica spheres. We find that thin, fractal shells below the percolation threshold exhibit geometrically tunable plasmon resonances. A modified scaling theory approach is used to model the dielectric response of such shells, which is then utilized to obtain the extinction cross section in a retarded Mie scattering formalism. We show that such spherical resonators support unique plasmon dynamics: in the visible there is a new regime of coherently driven cluster-localized plasmons, while crossover to homogeneous response in the infrared predicts a delocalized shell plasmon.
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"abstract": "We report on measurements of visible extinction spectra of semicontinuous\nsilver nanoshells grown on colloidal silica spheres. We find that thin, fractal\nshells below the percolation threshold exhibit geometrically tunable plasmon\nresonances. A modified scaling theory approach is used to model the dielectric\nresponse of such shells, which is then utilized to obtain the extinction cross\nsection in a retarded Mie scattering formalism. We show that such spherical\nresonators support unique plasmon dynamics: in the visible there is a new\nregime of coherently driven cluster-localized plasmons, while crossover to\nhomogeneous response in the infrared predicts a delocalized shell plasmon.",
"arxiv_id": "physics/0508208",
"authors": [
"Charles A. Rohde",
"Keisuke Hasegawa",
"Miriam Deutsch"
],
"categories": [
"physics.optics"
],
"doi": "10.1103/PhysRevLett.96.045503",
"title": "Coherent Light Scattering from Semicontinuous Silver Nanoshells Near the Percolation Threshold",
"url": "https://arxiv.org/abs/physics/0508208"
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