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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 5, Iss. 10 — Jul. 19, 2010

Asymmetric planar terahertz metamaterials

Ranjan Singh, Ibraheem A. I. Al-Naib, Martin Koch, and Weili Zhang  »View Author Affiliations


Optics Express, Vol. 18, Issue 12, pp. 13044-13050 (2010)
http://dx.doi.org/10.1364/OE.18.013044


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Abstract

We report an experimental observation of three distinct resonances in split ring resonators (SRRs) for both vertical and horizontal electric field polarizations at normal incidence by use of terahertz time-domain spectroscopy. Breaking the symmetry in SRRs by gradually displacing the capacitive gap from the centre towards the corner of the ring allows for an 85% modulation of the fundamental inductive-capacitive resonance. Increasing asymmetry leads to the evolution of an otherwise inaccessible high quality factor electric quadrupole resonance that can be exploited for bio-sensing applications in the terahertz region.

© 2010 OSA

OCIS Codes
(260.5740) Physical optics : Resonance
(160.3918) Materials : Metamaterials

ToC Category:
Metamaterials

History
Original Manuscript: April 19, 2010
Revised Manuscript: May 27, 2010
Manuscript Accepted: May 27, 2010
Published: June 2, 2010

Virtual Issues
Vol. 5, Iss. 10 Virtual Journal for Biomedical Optics

Citation
Ranjan Singh, Ibraheem A. I. Al-Naib, Martin Koch, and Weili Zhang, "Asymmetric planar terahertz metamaterials," Opt. Express 18, 13044-13050 (2010)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-18-12-13044


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