title: Midinfrared resonant magnetic nanostructures exhibiting a negative permeability.
abstract: We experimentally demonstrate the first midinfrared (mid-IR) resonant magnetic nanostructures exhibiting a strong magnetic response corresponding to a negative permeability. This result is an important step toward the achievement of a negative refractive index in the IR. The possibility of extending negative permeability to higher frequencies is discussed; a structure with a negative effective permeability at a near-IR resonance frequency of 230 THz (1.3 microm) is proposed.
authors.affiliation: Center for High Technology Materials, University of New Mexico, Albuquerque, NM 87106, USA.
authors.forename: Shuang
authors.initials: S
authors.lastname: Zhang
authors.forename: Wenjun
authors.initials: W
authors.lastname: Fan
authors.forename: B K
authors.initials: BK
authors.lastname: Minhas
authors.forename: Andrew
authors.initials: A
authors.lastname: Frauenglass
authors.forename: K J
authors.initials: KJ
authors.lastname: Malloy
authors.forename: S R J
authors.initials: SR
authors.lastname: Brueck