Phase-change materials (PCMs) offer a compelling platform for active metaoptics, owing to the large index contrast and fast yet stable phase transition attributes. In this talk, I will demonstrate our recent progress on in situ electrically driven tunable metasurfaces by harnessing the full potential of both archetypal PCM alloys (e.g., Ge2Sb2Te5) and less explored classes of PCM compounds (e.g., Sb2S3 and Sb2Se3), in order to realize non-volatile, reversible, multilevel, fast, and remarkable optical modulation in the near-infrared and visible spectral range. Dynamically reprogrammable flat optical devices including hybrid plasmonic-PCM metasurface and dual-view non-volatile micro-displays with record characteristics are presented.

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Sajjad Abdollahramezani, "Electrically reconfigurable nanophotonics using nonvolatile chalcogenide phase-change materials," Proc. SPIE PC12431, Photonic and Phononic Properties of Engineered Nanostructures XIII, PC124310L (Presented at SPIE OPTO: February 01, 2023; Published: 17 March 2023); https://doi.org/10.1117/12.2660294.6321430822112.