title: Sensing based on Fano-type resonance response of all-dielectric metamaterials.
abstract: A new sensing approach utilizing Mie resonances in metamaterial arrays composed of dielectric resonators is proposed. These arrays were found to exhibit specific, extremely high-Q factor (up to 15,000) resonances at frequencies corresponding to the lower edge of the array second transmission band. The observed resonances possessed with features typical for Fano resonances (FRs), which were initially revealed in atomic processes and recently detected in macro-structures, where they resulted from interference between local resonances and a continuum of background waves. Our studies demonstrate that frequencies and strength of Fano-type resonances in all-dielectric arrays are defined by interaction between local Mie resonances and Fabry-Perot oscillations of Bloch eigenmodes that makes possible controlling the resonance responses by changing array arrangements. The opportunity for obtaining high-Q responses in compact arrays is investigated and promising designs for sensing the dielectric properties of analytes in the ambient are proposed.
authors.affiliation: Department of Electrical and Computer Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA. esemouch@mtu.edu.
authors.forename: Elena
authors.initials: E
authors.lastname: Semouchkina
authors.affiliation: Department of Physics, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA. rduan@mtu.edu.
authors.forename: Ran
authors.initials: R
authors.lastname: Duan
authors.affiliation: Department of Electrical and Computer Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA. gbsemouc@mtu.edu.
authors.forename: George
authors.initials: G
authors.lastname: Semouchkin
authors.affiliation: Department of Physics, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA. pandey@mtu.edu.
authors.forename: Ravindra
authors.initials: R
authors.lastname: Pandey