title: Strongly tunable circular dichroism in gammadion chiral phase-change metamaterials.
abstract: A metal/phase-change material/metal tri-layer planar chiral metamaterial in the shape of a gammadion is numerically modelled. The chiral metamaterial is integrated with Ge2Sb2Te5 phase-change material (PCM) to accomplish a wide tuning range of the circular dichroism (CD) in the mid-infrared wavelength regime. A photothermal model is used to study the temporal variation of the temperature of the Ge2Sb2Te5 layer and to show the potential for fast switching the phase of Ge2Sb2Te5 under a low incident light intensity of 0.016mW/μm2.
authors: Tun
authors: T
authors: Cao
authors: Lei
authors: L
authors: Zhang
authors: Robert E
authors: RE
authors: Simpson
authors: Chenwei
authors: C
authors: Wei
authors: Martin J
authors: MJ
authors: Cryan