期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 103, 期 29, 页码 10856-10860出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0604003103
关键词
nanostructures; plasmon hybridization; spectroscopy
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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