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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 6, Iss. 8 — Aug. 26, 2011

Superfocusing effect in the chain of silver nanorods

Zhidong Zhang, Zhongyue Zhang, and Hongyan Wang  »View Author Affiliations


Applied Optics, Vol. 50, Issue 20, pp. 3513-3518 (2011)
http://dx.doi.org/10.1364/AO.50.003513


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Abstract

A chain of three silver nanorods with progressively decreasing sizes and separations is designed to focus the electric fields around the small nanorods. The optical properties of the chain of silver nanorods are investigated by the discrete dipole approximation method. The results show that, compared with the individual small nanorod and the chain of two nanorods, many enhanced electric fields are focused around the small nanorod of the chain of three nanorods due to the electric field couplings between adjacent nanorods. Therefore, the design of the chain of three nanorods provides a way to obtain stronger electric fields. In addition, how the structural parameters of the chain of three nanorods affect their optical properties is also studied.

© 2011 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(310.6628) Thin films : Subwavelength structures, nanostructures
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Optics at Surfaces

History
Original Manuscript: January 13, 2011
Revised Manuscript: May 21, 2011
Manuscript Accepted: May 23, 2011
Published: July 5, 2011

Virtual Issues
Vol. 6, Iss. 8 Virtual Journal for Biomedical Optics

Citation
Zhidong Zhang, Zhongyue Zhang, and Hongyan Wang, "Superfocusing effect in the chain of silver nanorods," Appl. Opt. 50, 3513-3518 (2011)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-50-20-3513


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