Open AccessTerahertz near-field imaging of electric and magnetic resonances of a planar metamaterial
Author(s) -
Andreas Bitzer,
Hannes Merbold,
Andreas Thoman,
Thomas Feurer,
H. Helm,
Markus Walther
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.003826
Subject(s) - metamaterial , split ring resonator , terahertz radiation , electric field , planar , optics , polarization (electrochemistry) , magnetic field , physics , resonator , amplitude , terahertz spectroscopy and technology , photonic metamaterial , computer science , chemistry , computer graphics (images) , quantum mechanics
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.