title: Tunable magnetic resonance in double layered metallic structures.
abstract: Double layered metallic gratings have been investigated both theoretically and experimentally. The authors have reported that tunable magnetic resonance (MR) can be achieved by modulating the vertical chirped width dh which could be controlled conveniently in the common electron and/or ion beam microfabrications. The linear relationship between MR wavelength and dh has been reported. By introducing the difference of electric and magnetic penetration depth, an analytic formula deduced from a modified LC model has shown good agreement with the simulation results, and an effective width for trapezoidal sandwiched microstructures has been presented. Our results may provide an alternative choice for tunable MR and broad bandwidth of magnetic metamaterials.
authors.affiliation: National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, PR China.
authors.forename: L
authors.initials: L
authors.lastname: Zhou
authors.forename: Y Y
authors.initials: YY
authors.lastname: Zhu