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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 36, Iss. 22 — Nov. 15, 2011
  • pp: 4386–4388

Shape of Fano resonance line spectra calculated for silver nanorods

Jennifer M. Reed, Haining Wang, Wenfang Hu, and Shengli Zou  »View Author Affiliations


Optics Letters, Vol. 36, Issue 22, pp. 4386-4388 (2011)
http://dx.doi.org/10.1364/OL.36.004386


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Abstract

Using theoretical tools, we numerically demonstrated Fano line shapes in the scattering spectra of silver rods resulting from different mechanisms. One of the Fano line shapes is due to the coupling of an in-plane quadrupole and a dipole mode in a single rod. Two nodes were observed at the resonance wavelength, each of which is located at a quarter of the rod length from the two ends. The Fano resonance is strengthened when the silver rod is cut at the two nodal positions. The second mechanism that gives rise to a new Fano resonance peak occurs when the symmetry of the rod is broken and is a result of the asymmetric coupling between the two excited dipoles.

© 2011 Optical Society of America

OCIS Codes
(260.3910) Physical optics : Metal optics
(290.5890) Scattering : Scattering, stimulated
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optoelectronics

History
Original Manuscript: August 9, 2011
Revised Manuscript: September 20, 2011
Manuscript Accepted: October 5, 2011
Published: November 15, 2011

Citation
Jennifer M. Reed, Haining Wang, Wenfang Hu, and Shengli Zou, "Shape of Fano resonance line spectra calculated for silver nanorods," Opt. Lett. 36, 4386-4388 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-22-4386


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