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Advances in OptoElectronics
Volume 2012 (2012), Article ID 609691, 5 pages
http://dx.doi.org/10.1155/2012/609691
Research Article

Magnetic Plasmon Sensing in Twisted Split-Ring Resonators

Department of Physics and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China

Received 10 February 2012; Accepted 31 March 2012

Academic Editor: Ivan D. Rukhlenko

Copyright © 2012 J. X. Cao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We studied the sensing properties of stereo-SRRs metamaterials composed from two twisted split-ring resonators (SRRs). Due to the strong hybridization effect in the system, the polarization state of the transmitted wave is greatly changed at resonances. Since the stereo-SRRs structure is strongly coupled to the surrounding medium, the polarization change of the transmitted waves is quite sensitive to the refractive index change of the environment medium. The polarization ratio PRtran=Ty/Tx is used as sensing parameter and its figure of merit can reach 22.3 at the hybridized magnetic plasmon resonance. The results showed that the stereo-SRRs metamaterial can be applied to optical sensors an or other related field.