Surface-plasmon polaritons in a lattice of metal cylinders

Inglesfield, John Ewan, Pitarke, J. M. and Giannakis, A. N. 2007. Surface-plasmon polaritons in a lattice of metal cylinders. Physical Review B 75 (16) , 165415. 10.1103/PhysRevB.75.165415

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Abstract

Plasmon modes of a two-dimensional lattice of long conducting circular wires are investigated by using an embedding technique to solve Maxwell’s equations rigorously. The frequency-dependent density of states is calculated for various values of the wave vector and the filling fraction. At low filling fractions, collective modes are all found to accumulate at the surface-plasmon frequency ωp∕√2, ωp being the bulk plasmon frequency. As the filling fraction increases, the interference between the electromagnetic fields generated by localized surface-plasmon polaritons leads to the presence of new resonances, whose frequency strongly depends on the interparticle separation. For touching wires, a number of multipole resonances fill the spectral range between dipole resonances, as occurs in the case of a three-dimensional packing of metal spheres.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics Q Science > QD Chemistry
Publisher:	American Physical Society
ISSN:	1098-0121
Last Modified:	21 May 2023 18:00
URI:	https://orca.cardiff.ac.uk/id/eprint/1662

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