Title

Light-Driven Circular Plasmon Current In A Silver Nanoring

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. © 2008 Optical Society of America.

Publication Date

9-15-2008

Publication Title

Optics Letters

Volume

33

Issue

18

Number of Pages

2113-2115

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/OL.33.002113

Socpus ID

54749129525 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/54749129525

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