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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 9. — Resonant frequency spectrum of mode 27 with respect to the change of adsorbed substance permittivity ɛ_s. From left to right, the curves correspond to ɛ_s = 1.02, 1.04, 1.06, 1.08 and 1.1, respectively. (a) The traditional microring sensor. (b–f) show the simulation results of the metamaterial sensor with a metamaterial layer in the thickness of 0.06 μm, 0.09 μm, 0.12 μm, 0.15 μm, and 0.18 μm respectively, attached to the inner side.

Figure 9. — Resonant frequency spectrum of mode 27 with respect to the change of adsorbed substance permittivity ɛ_s. From left to right, the curves correspond to ɛ_s = 1.02, 1.04, 1.06, 1.08 and 1.1, respectively. (a) The traditional microring sensor. (b–f) show the simulation results of the metamaterial sensor with a metamaterial layer in the thickness of 0.06 μm, 0.09 μm, 0.12 μm, 0.15 μm, and 0.18 μm respectively, attached to the inner side.