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. 2011 May 31;11(6):5886–5899. doi: 10.3390/s110605886

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© 2011 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 8. — Resonant frequency spectrum of mode 27 with respect to the increase of substance layer thickness t. (a) The traditional microring sensor. (b) The metamaterial sensor.