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Magnetic excitation of magnetic resonance in metamaterials at far-infrared frequencies

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3 Author(s)
Ishikawa, A. ; Nanophotonics Laboratory, RIKEN (The Institute of Physical and Chemical Research), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan and Department of Applied Physics, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan ; Tanaka, Takuo ; Kawata, Satoshi

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The authors experimentally demonstrated magnetically excited magnetic resonances with negative magnetic permeability in a metamaterial composed of an array of silver rod pairs. In transmission spectroscopy of the metamaterial, by employing oblique incidence, an incident-magnetic-field-dependent absorption feature was clearly observed at 18 THz. The experimental results directly prove that the rod pair structure interacted with the magnetic field of the incident light, producing magnetic resonance. The experimental results were in good agreement with a numerical simulation suggesting that the value of μRe of the silver rod pair array changes from -0.29 to 2.26 at resonance.

Published in:

Applied Physics Letters  (Volume:91 ,  Issue: 11 )

Date of Publication:

Sep 2007

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