Cooperative resonance linewidth narrowing in a planar metamaterial

Jenkins, S.D. and Ruostekoski, J. (2012) Cooperative resonance linewidth narrowing in a planar metamaterial. New Journal of Physics, 14. p. 103003. ISSN 1367-2630

Abstract

We theoretically analyze the experimental observations of a spectral line collapse in a metamaterial array of asymmetric split ring resonators [Fedotov et al., Phys. Rev. Lett. 104, 223901 (2010)]. We show that the ensemble of closely-spaced resonators exhibits cooperative response, explaining the observed system-size dependent narrowing of the transmission resonance linewidth. We further show that this cooperative narrowing depends sensitively on the lattice spacing.