Plasmon Bands in Metallic Nanostructures

Inglesfield, John Ewan, Pitarke, J. M. and Kemp, R. 2004. Plasmon Bands in Metallic Nanostructures. Physical Review B 69 (23) , 233103. 10.1103/PhysRevB.69.233103

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Abstract

The photonic band structure of a three-dimensional lattice of metal spheres is calculated using an embedding technique, in the frequency range of the Mie plasmons. For a small filling factor of the spheres, the Maxwell-Garnett theory gives an almost exact description of the dipole modes, and the multipole modes are fairly dispersionless. For a larger filling factor, crystal field effects modify the multipole frequencies, which show dispersion. These multipole bands are enclosed between the dipole modes. For touching spheres, there is a wide continuum of plasmon modes between zero frequency and the bulk metal plasmon frequency, which yield strong absorption of incident light. These plasmon modes are responsible for the blackness of colloidal silver.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	American Physical Society
ISSN:	1098-0121
Last Modified:	15 May 2023 03:48
URI:	https://orca.cardiff.ac.uk/id/eprint/1660

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