title: A microring resonator based negative permeability metamaterial sensor.
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.
authors.affiliation: School of Information Science and Engineering, Yunnan University, Kunming 650091, China. em.junsun@gmail.com
authors.forename: Jun
authors.initials: J
authors.lastname: Sun
authors.forename: Ming
authors.initials: M
authors.lastname: Huang
authors.forename: Jing-Jing
authors.initials: JJ
authors.lastname: Yang
authors.forename: Ting-Hua
authors.initials: TH
authors.lastname: Li
authors.forename: Yao-Zhong
authors.initials: YZ
authors.lastname: Lan
mesh_terms: D000465:Algorithms; D015374:Biosensing Techniques; D003198:Computer Simulation; D003201:Computers; D060733:Electromagnetic Radiation; D020342:Finite Element Analysis; D008422:Materials Testing; D015233:Models, Statistical; D010539:Permeability; D012542:Scattering, Radiation; D012984:Software; D013499:Surface Properties