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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 33, Iss. 18 — Sep. 15, 2008
  • pp: 2113–2115

Light-driven circular plasmon current in a silver nanoring

Shengli Zou  »View Author Affiliations

Optics Letters, Vol. 33, Issue 18, pp. 2113-2115 (2008)

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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

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(350.6050) Other areas of optics : Solar energy
(160.4236) Materials : Nanomaterials
(350.4238) Other areas of optics : Nanophotonics and photonic crystals

ToC Category:

Original Manuscript: May 20, 2008
Revised Manuscript: August 7, 2008
Manuscript Accepted: August 8, 2008
Published: September 12, 2008

Shengli Zou, "Light-driven circular plasmon current in a silver nanoring," Opt. Lett. 33, 2113-2115 (2008)

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