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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 24 — Dec. 15, 2013
  • pp: 5216–5219

Fano resonances in metasurfaces made of linear trimers of plasmonic nanoparticles

Salvatore Campione, Caner Guclu, Regina Ragan, and Filippo Capolino  »View Author Affiliations

Optics Letters, Vol. 38, Issue 24, pp. 5216-5219 (2013)

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We investigate Fano resonances in planar two-dimensional periodic arrays of linear trimers of plasmonic nanoparticles that appear under plane wave incidence. The observed Fano resonances are associated to resonances belonging to the trimer (metamolecule) itself, where some are found to be strongly affected by the array periodicity. We observe that array-dependent resonances appearing for oblique incidence are resistant to losses, whereas narrow dipolar-like Fano resonances associated mainly to the metamolecule, which appear also under normal incidence, disappear when losses are too high. In particular, we prove the latter by theoretical (dipolar approximation) and full-wave simulations, in good agreement. We propose that the use of very low-loss plasmonic materials or the use of gain materials to mitigate plasmonic losses may lead to (high-quality factor) dipolar-like Fano resonances under normal incidence, exhibiting a certain degree of fabrication defect tolerance, which might be employed to improve sensors, lasing, switching, and nonlinear devices, for example.

© 2013 Optical Society of America

OCIS Codes
(160.4760) Materials : Optical properties
(160.3918) Materials : Metamaterials
(250.5403) Optoelectronics : Plasmonics

ToC Category:

Original Manuscript: July 15, 2013
Revised Manuscript: September 13, 2013
Manuscript Accepted: October 16, 2013
Published: December 3, 2013

Salvatore Campione, Caner Guclu, Regina Ragan, and Filippo Capolino, "Fano resonances in metasurfaces made of linear trimers of plasmonic nanoparticles," Opt. Lett. 38, 5216-5219 (2013)

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