Optics Express · 2013 · 117 citations · 37 references
Natural SciencesMaterials EngineeringMaterials ScienceElectronic MaterialsMaterials PhysicsOptical MaterialsElectro-optic MaterialsInfrared Optical MaterialsOptical Properties Of MaterialsOptical Properties Of SolidsPhase ChangePhotonic MaterialsCircular DichroismLight IntensityMetamaterial ModelingMetamaterial SimulationMetamaterialsPhase-change MaterialsPhotothermal EffectsTuning Range
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.
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Natural Sciences, Materials Engineering, Materials Science +14