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Opt Lett. 2006 Mar 1;31(5):634-6.

Transmission properties of terahertz pulses through subwavelength double split-ring resonators.

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School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA.


We present a terahertz time-domain spectroscopy study of the transmission properties of planar composite media made from subwavelength double split-ring resonators (SRRs). The measured amplitude transmission spectra reveal a resonance near 0.5 THz, the central frequency of most ultrafast terahertz systems, for one SRR orientation in normal-incidence geometry. This resonance is attributed to the effect of electric excitation of magnetic resonance of the SRR arrays. In addition, the influences of background substrate, lattice constant, and the shapes of the SRRs on the terahertz resonance are experimentally investigated and agree well with the results of recent numerical studies.

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