title: Resonance control of mid-infrared metamaterials using arrays of split-ring resonator pairs.
abstract: We present our design, fabrication and characterization of resonance-controllable metamaterials operating at mid-infrared wavelengths. The metamaterials are composed of pairs of back-to-back or face-to-face U-shape split-ring resonators (SRRs). Transmission spectra of the metamaterials are measured using Fourier-transform infrared spectroscopy. The results show that the transmission resonance is dependent on the distance between the two SRRs in each SRR pair. The dips in the transmission spectrum shift to shorter wavelengths with increasing distance between the two SRRs for both the back-to-back and face-to-face SRR pairs. The position of the resonance dips in the spectrum can hence be controlled by the relative position of the SRRs. This mechanism of resonance control offers a promising way of developing metamaterials with tunability for optical filters and bio/chemical sensing devices in integrated nano-optics.
authors.affiliation: National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK.
authors.forename: Weisheng
authors.initials: W
authors.lastname: Yue
authors.forename: Zhihong
authors.initials: Z
authors.lastname: Wang
authors.forename: John
authors.initials: J
authors.lastname: Whittaker
authors.forename: Fredrik
authors.initials: F
authors.lastname: Schedin
authors.forename: Zhipeng
authors.initials: Z
authors.lastname: Wu
authors.forename: Jiaguang
authors.initials: J
authors.lastname: Han