期刊
PHYSICAL REVIEW B
卷 84, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.085416
关键词
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资金
- Deutsche Forschungsgemeinschaft (DFG)
- State of Baden-Wurttemberg
- Karlsruhe Institute of Technology (KIT) through the DFG Center for Functional Nanostructures (CFN) [A 1.5]
- Future and Emerging Technologies (FET) within European Commission [213390]
- Bundesministerium fur Bildung und Forschung (BMBF)
- Department of Energy (Basic Energy Sciences) [DE-AC02-07CH11358]
We systematically investigate the optical extinction spectra of planar gold split-ring-resonator square arrays operating at similar to 200-THz frequency versus the lattice constant and versus angle of incidence. We find a strong dependence of the resonance damping on the in-plane wave vector, namely, the resonance damping increases (decreases) versus the in-plane wave vector for small lattice constants (large lattice constants). By comparison with two simple one-dimensional models as well as with more complete numerical calculations, this behavior is interpreted in terms of a long-range retarded interaction among the split-ring resonators. In contrast, the assumptions of only nearest-neighbor interaction and/or of an instantaneous interaction lead to a striking disagreement with the overall experimental facts.
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