Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 103, Issue 29, Pages 10856-10860Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0604003103
Keywords
nanostructures; plasmon hybridization; spectroscopy
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The plasmon resonances of a concentric metallic nanoshell arise from the hybridization of primitive plasmon modes of the same angularmomenturn on its inner and outer surfaces. Fora nanoshell with an offset core, the reduction in symmetry relaxes these selection rules, allowing for an admixture of dipolar components in all plasmon modes of the particle. This metallodielectric nanostructure with reduced symmetry exhibits a core offset-dependent multipeaked spectrum, seen in single-particle spectroscopic measurements, and exhibits significantly larger local-field enhancements on its external surface than the equivalent concentric spherical nanostructure.
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