title: Terahertz near-field imaging of electric and magnetic resonances of a planar metamaterial.
abstract: Experimental investigations of the microscopic electric and in particular the magnetic near-fields in metamaterials remain highly challenging and current studies rely mostly on numerical simulations. Here we report a terahertz near-field imaging approach which provides spatially resolved measurements of the amplitude, phase and polarization of the electric field from which we extract the microscopic magnetic near-field signatures in a planar metamaterial constructed of split-ring resonators (SRRs). In addition to studying the fundamental resonances of an individual double SRR unit we further investigate the interaction with neighboring elements.
authors.affiliation: Freiburg Materials Research Center, University of Freiburg, Stefan-Meier-Strasse 21,D-79104 Freiburg, Germany. andreas.bitzer@gmail.com
authors.forename: Andreas
authors.initials: A
authors.lastname: Bitzer
authors.forename: Hannes
authors.initials: H
authors.lastname: Merbold
authors.forename: Andreas
authors.initials: A
authors.lastname: Thoman
authors.forename: Thomas
authors.initials: T
authors.lastname: Feurer
authors.forename: Hanspeter
authors.initials: H
authors.lastname: Helm
authors.forename: Markus
authors.initials: M
authors.lastname: Walther