Terahertz near-field imaging of electric and magnetic resonances of a planar metamaterial.
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.
Bitzer
Andreas
A
Freiburg Materials Research Center, University of Freiburg, Stefan-Meier-Strasse 21,D-79104 Freiburg, Germany. andreas.bitzer@gmail.com
Merbold
Hannes
H
Thoman
Andreas
A
Feurer
Thomas
T
Helm
Hanspeter
H
Walther
Markus
M