Title

Light-driven circular plasmon current in a silver nanoring

Authors

Authors

S. L. Zou

Comments

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Abbreviated Journal Title

Opt. Lett.

Keywords

OPTICAL-PROPERTIES; NEGATIVE INDEX; WAVE-GUIDES; REFRACTION; FIELD; GOLD; NANOPARTICLES; ARRAY; Optics

Abstract

A circular plasmon current in a silver nanoring is demonstrated and investigated with electrodynamics theory. The circular current is driven by the incident plane electromagnetic wave. For a silver ring with a thickness of 50 nm and inner and outer diameters of 200 and 300 nm, the circular current can be obtained when the incident wavelength is at 650 nm, which is about twice the diameter of the ring. The circular current can be observed only when the incident wave and the polarization directions are both parallel to the ring plane. The resonance wavelength shifts to red with the expansion of the ring diameter and the drop in the ring thickness. The discovery holds promise for the design of artificial materials with negative refractive index in the visible wavelengths and might stimulate new ideas for the development of nanoelectronic devices. (c) 2008 Optical Society of America

Journal Title

Optics Letters

Volume

33

Issue/Number

18

Publication Date

1-1-2008

Document Type

Article

Language

English

First Page

2113

Last Page

2115

WOS Identifier

WOS:000259891400032

ISSN

0146-9592

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