title: Expanding the band of negative permeability of a composite structure with dual-band negative permeability.
abstract: We provide a design of a metallic composite structure, which simultaneously shows dual-band negative permeability (DNP) in two optical ranges. Numerical simulation demonstrates that different shifting of the two magnetic resonances can be observed. This structure property allows the realization of a wide range of negative permeability covering near-infrared (NIR) and visible ranges simultaneously. The alterability of the two neighboring negative permeability would provide a way to realize an effective pass-band of a meta-material with negative permeability at optical frequencies.
authors.affiliation: State Key Laboratory of Optical Technologies for Microfabrication, Institute of Optics and Electronics, Chinese Academy of Sciences.
authors.forename: Chenggang
authors.initials: C
authors.lastname: Hu
authors.forename: Liyuan
authors.initials: L
authors.lastname: Liu
authors.forename: Xu'Nan
authors.initials: X
authors.lastname: Chen
authors.forename: XianGang
authors.initials: X
authors.lastname: Luo