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Superfocusing effect in the chain of silver nanorods |
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/ao/abstract.cfm?URI=ao-50-20-3513
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