Coupling between a dark and a bright eigenmode in a terahertz metamaterial
Optics
2009-11-13 v1
Abstract
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.
Keywords
Cite
@article{arxiv.0901.0365,
title = {Coupling between a dark and a bright eigenmode in a terahertz metamaterial},
author = {Ranjan Singh and Carsten Rockstuhl and Falk Lederer and Weili Zhang},
journal= {arXiv preprint arXiv:0901.0365},
year = {2009}
}