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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 17 — Aug. 17, 2009
  • pp: 15372–15380

Asymmetric coupling between subradiant and superradiant plasmonic resonances and its enhanced sensing performance

Chia-Yun Chen, Ieng-Wai Un, Nyan-Hwa Tai, and Ta-Jen Yen  »View Author Affiliations


Optics Express, Vol. 17, Issue 17, pp. 15372-15380 (2009)
http://dx.doi.org/10.1364/OE.17.015372


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Abstract

We present symmetric and asymmetric couplings within a pair of split-ring resonators (SRRs). The former shows a single transmittance dip, following the equivalent circuit model; yet, the latter introduces an additional transmittance peak, stemming from an asymmetrically coupled resonance (ACR) between the subradiant and superradiant modes. The mechanism of such induced transparency is elucidated well by the suppression of induced currents within the SRR element with a lower quality factor. Finally, the excitation of ACR is further associated with remarkable confinement of electromagnetic field, providing a compelling sensing performance based on its excellent sensitivity and figure of merit.

© 2009 OSA

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

ToC Category:
Metamaterials

History
Original Manuscript: June 26, 2009
Revised Manuscript: August 6, 2009
Manuscript Accepted: August 10, 2009
Published: August 14, 2009

Citation
Chia-Yun Chen, Ieng-Wai Un, Nyan-Hwa Tai, and Ta-Jen Yen, "Asymmetric coupling between subradiant and superradiant plasmonic resonances and its enhanced sensing performance," Opt. Express 17, 15372-15380 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-17-15372


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