Tuesday, 3 March 2015

Double Fano resonances in a composite metamaterial possessing tripod plasmonic resonances

Y U Lee, E Y Choi, E S Kim, J H Woo, B Kang, J Kim, Byung Cheol Park, T Y Hong, Jae Hoon Kim and J W Wu


Abstract


By embedding four-rod resonators inside a double-split ring resonator superlattice, a planar composite metamaterial possessing tripod plasmonic resonances is fabricated. Double Fano resonances are observed where a common subradiant driven oscillator is coupled with two superradiant oscillators. As a classical analogue of a four-level tripod atomic system, the extinction spectrum of the composite metamaterial exhibits a coherent effect based on double Fano resonances. Transfer of the absorbed power between two orthogonal superradiant oscillators is shown to be mediated by the common subradiant oscillator.

This study was performed using TeraView's Spectra 3000 system. (TeraView, Cambridge, UK)