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5 March 2022 Electrically reconfigurable hybrid phase-change metasurfaces
Sajjad Abdollahramezani, Ali Adibi
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Proceedings Volume PC12010, Photonic and Phononic Properties of Engineered Nanostructures XII; PC1201008 (2022) https://doi.org/10.1117/12.2617751
Event: SPIE OPTO, 2022, San Francisco, California, United States
Abstract
Here, we demonstrate an in situ electrically driven tunable metasurface by harnessing the full potential of a phase-change material (PCM) alloy, Ge2Sb2Te5 (GST), in order to realize non-volatile, reversible, multilevel, fast, and remarkable optical modulation in the near-infrared spectral range. A dynamically reprogrammable hybrid plasmonic-PCM metasurface with record eleven-fold change in the reflectance (absolute reflectance contrast reaching 80%), unprecedented quasi-continuous spectral tuning over 250 nm, and switching speed that can potentially reach a few kHz is presented. Capitalizing on such unique properties, we also demonstrate an actively tunable gradient phase-change metasurface for beam steering with a large beam deflection angle.
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Sajjad Abdollahramezani and Ali Adibi "Electrically reconfigurable hybrid phase-change metasurfaces", Proc. SPIE PC12010, Photonic and Phononic Properties of Engineered Nanostructures XII, PC1201008 (5 March 2022); https://doi.org/10.1117/12.2617751
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KEYWORDS
Reflectivity
Beam steering
Heterojunctions
Integrated optics
Laser scattering
Modulation
Scattering
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