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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 16 — Aug. 15, 2012
  • pp: 3366–3368

Low-loss ultra-high-Q dark mode plasmonic Fano metamaterials

Wei Cao, Ranjan Singh, Ibraheem A. I Al-Naib, Mingxia He, Antoinette J. Taylor, and Weili Zhang  »View Author Affiliations


Optics Letters, Vol. 37, Issue 16, pp. 3366-3368 (2012)
http://dx.doi.org/10.1364/OL.37.003366


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Abstract

We experimentally demonstrate a planar terahertz Fano metamaterial with an ultrahigh quality (Q) factor of 227. This is achieved by the excitation of the nonradiative dark modes by introducing a tiny asymmetry in the metamaterial structure. The extremely sharp quadrupole and Fano resonances are excited at normal incidence for orthogonal polarizations of the electric field. In order to capture the narrow linewidth of the dark resonance modes, we perform high resolution terahertz time–domain measurements with a scan length of 200 picoseconds and frequency resolution of 5 GHz. These high-Q metamaterials can be used in ultrasensitive label-free terahertz sensing, dense photonic integration, and narrowband filtering.

© 2012 Optical Society of America

OCIS Codes
(160.3918) Materials : Metamaterials
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Materials

History
Original Manuscript: April 6, 2012
Revised Manuscript: June 11, 2012
Manuscript Accepted: July 10, 2012
Published: August 7, 2012

Citation
Wei Cao, Ranjan Singh, Ibraheem A. I Al-Naib, Mingxia He, Antoinette J. Taylor, and Weili Zhang, "Low-loss ultra-high-Q dark mode plasmonic Fano metamaterials," Opt. Lett. 37, 3366-3368 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-16-3366

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