2000 character limit reached
All-dielectric phase-change reconfigurable metasurface (1604.01330v2)
Published 5 Apr 2016 in cond-mat.mes-hall and physics.optics
Abstract: We harness non-volatile, amorphous-crystalline transitions in the chalcogenide phase-change medium germanium antimony telluride (GST) to realize optically-switchable, all-dielectric metamaterials. Nanostructured, subwavelength-thickness films of GST present high-quality resonances that are spectrally shifted by laser-induced structural transitions, providing reflectivity and transmission switching contrast ratios of up to 5:1 (7 dB) at visible/near-infrared wavelengths selected by design.