Journal
PHYSICAL REVIEW B
Volume 79, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.085111
Keywords
eigenvalues and eigenfunctions; metamaterials; microwave materials; optical resonators; plasmonics; polaritons; terahertz wave spectra
Funding
- U. S. National Science Foundation
- German Federal Ministry of Education and Research (Metamat).
- Directorate For Engineering
- Div Of Industrial Innovation & Partnersh [0832304] Funding Source: National Science Foundation
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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 nonidentical 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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