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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 16 — Aug. 3, 2009
  • pp: 14211–14228

Unraveling near-field origin of electromagnetic waves scattered from silver nanorod arrays using pseudo-spectral time-domain calculation

Bang-Yan Lin, Hui-Chen Hsu, Chun-Hao Teng, Hung-Chun Chang, Juen-Kai Wang, and Yuh-Lin Wang  »View Author Affiliations


Optics Express, Vol. 17, Issue 16, pp. 14211-14228 (2009)
http://dx.doi.org/10.1364/OE.17.014211


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Abstract

In this study, we report the investigation of both near- and far-field electromagnetic characteristics of two-dimensional silver nanorod arrays embedded in anodic aluminum oxide with the use of a high-accuracy three-dimensional Legendre pseudospectral time-domain scheme. The simulated far-field scattering spectra agree with the experimental observations. We show that enhanced electric field is created between adjacent nanorods and, most importantly, far-field scattered light wave is mainly contributed from surface magnetic field, instead of the surface enhanced electric field. The identified near-field to far-field connection produces an important implication in the development of efficient surface-enhanced Raman scattering substrates.

© 2009 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(290.5850) Scattering : Scattering, particles
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Optics at Surfaces

History
Original Manuscript: April 27, 2009
Revised Manuscript: July 7, 2009
Manuscript Accepted: July 13, 2009
Published: July 31, 2009

Citation
Bang-Yan Lin, Hui-Chen Hsu, Chun-Hao Teng, Hung-Chun Chang, Juen-Kai Wang, and Yuh-Lin Wang, "Unraveling near-field origin of electromagnetic waves scattered from silver nanorod arrays using pseudo-spectral time-domain calculation," Opt. Express 17, 14211-14228 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-16-14211


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