1,233 research outputs found
Controlling metamaterial resonances via dielectric and aspect ratio effects
We study ways to enhance the sensitivity and dynamic tuning range of the
fundamental inductor-capacitor (LC) resonance in split ring resonators (SRRs)
by controlling the aspect ratio of the SRRs and their substrate thickness. We
conclude that both factors can significantly affect the LC resonance. We show
that metafilms consisting of low height SRRs on a thin substrate are most
sensitive to changes in their dielectric environment and thus show excellent
potential for sensing applications.Comment: 4 pages with 4 figure
Coupling between a dark and a bright eigenmode in a terahertz metamaterial
Terahertz time domain spectroscopy and rigorous simulations are used to probe
the coupling between a dark and a bright plasmonic eigenmode in a metamaterial
with broken symmetry. The metamaterial consists of two closely spaced split
ring resonators that have their gaps in non-identical positions within the
ring. For normal incidence and a fixed polarization both lowest order
eigenmodes of the split ring resonators can be excited; although one of them
has to be regarded as dark since coupling is prohibited because of symmetry
constraints. Emphasis in this work is put on a systematic evaluation of the
coupling effects depending on a spectral tuning of both resonances
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