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.

Topics
Plasmonics, Metamaterials, Focused ion beam, Annealing, Liquid crystals, Materials properties, Optical properties, Thin films, Optical elements, Optical metrology
© 2016 Author(s).
2016
Author(s)

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