Strong coupling of light to flat metals via a buried nanovoid lattice: the interplay of localized and free plasmons


Teperik, Tatiana V., Popov, Vyacheslav V., García de Abajo, F. Javier, Abdelsalam, Mamdouh, Bartlett, Philip N., Kelf, Tim A., Suguwara, Yoshihiro and Baumberg, Jeremy J. (2006) Strong coupling of light to flat metals via a buried nanovoid lattice: the interplay of localized and free plasmons Optics Express, 14, (5), pp. 1965-1972.

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Description/Abstract

We study the optical plasmonic properties of metal surfaces which have a periodic lattice of voids buried immediately beneath their flat upper surface. Light reflection spectra calculated in the framework of a selfconsistent electromagnetic multiple-scattering layer-KKR approach exhibit two types of plasmon resonances originating from the excitation of different plasmon modes: surface plasmon-polaritons propagating on the planar surface of metal and Mie plasmons localized in the buried voids. Coupling between these two types of plasma oscillation leads to an enhancement of the surface plasmon-polariton resonances even for close-packed void lattices. Our theoretical model quantitatively agrees with experimental results, demonstrating that planar surfaces can exhibit strong plasmonic field enhancements.

Item Type: Article
ISSNs: 1094-4087 (print)
Related URLs:
Keywords: surface plasmons, microstructure fabrication, mie theory, multiple scattering, metals, gratings
Subjects:
ePrint ID: 21023
Date :
Date Event
2006Published
Date Deposited: 09 Mar 2006
Last Modified: 16 Apr 2017 22:57
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/21023

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