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Correction: Yoshie, T. et al. Optical Microcavity: Sensing downto Single Molecules and Atoms. Sensors 2011, 11, 1972-1991
Sensors 2011, 11(8), 8060-8071; doi:10.3390/s110808060
Article

A Microring Resonator Based Negative Permeability Metamaterial Sensor

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Received: 16 July 2011 / Revised: 12 August 2011 / Accepted: 15 August 2011 / Published: 17 August 2011
(This article belongs to the Special Issue Optical Resonant Microsensors)
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Abstract

Metamaterials are artificial multifunctional materials that acquire their material properties from their structure, rather than inheriting them directly from the materials they are composed of, and they may provide novel tools to significantly enhance the sensitivity and resolution of sensors. In this paper, we derive the dispersion relation of a cylindrical dielectric waveguide loaded on a negative permeability metamaterial (NPM) layer, and compute the resonant frequencies and electric field distribution of the corresponding Whispering-Gallery-Modes (WGMs). The theoretical resonant frequency and electric field distribution results are in good agreement with the full wave simulation results. We show that the NPM sensor based on a microring resonator possesses higher sensitivity than the traditional microring sensor since with the evanescent wave amplification and the increase of NPM layer thickness, the sensitivity will be greatly increased. This may open a door for designing sensors with specified sensitivity.
Keywords: metamaterials; sensor; WGMs; microring resonator metamaterials; sensor; WGMs; microring resonator
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.

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Sun, J.; Huang, M.; Yang, J.-J.; Li, T.-H.; Lan, Y.-Z. A Microring Resonator Based Negative Permeability Metamaterial Sensor. Sensors 2011, 11, 8060-8071.

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