Dynamic Hybrid Metasurfaces

next-generation reprogrammable meta. Biophysics incident light FOS: Physical sciences all-dielectric nanoantennas Applied Physics (physics.app-ph) 02 engineering and technology specular beam deflection modulation depth metasurface platform Genetics GST phase-change material Ge 2 Sb 2 Te 5 Molecular Biology Cancer tunable metasurfaces plasmonic-photonic resonances reduced-dimension meta-atom Cell Biology Physics - Applied Physics plasmonic-photonic metasurfaces Dynamic Hybrid Metasurfaces Efficient postfabrication tunable metal-dielectric meta-atoms 0210 nano-technology Physical Sciences not elsewhere classified Developmental Biology Biological Sciences not elsewhere classified Physics - Optics Optics (physics.optics)
DOI: 10.1021/acs.nanolett.0c03625 Publication Date: 2021-01-23T03:40:03Z
ABSTRACT
Efficient hybrid plasmonic-photonic metasurfaces that simultaneously take advantage of the potential both pure metallic and all-dielectric nanoantennas are identified as an emerging technology in flat optics. Nevertheless, post-fabrication tunable still elusive. Here, we present a reconfigurable metasurface platform by incorporating phase-change material Ge$_{2}$Sb$_{2}$Te$_{5}$ (GST) into metal-dielectric meta-atoms for active non-volatile tuning properties light. We systematically design reduced-dimension meta-atom, which selectively controls fundamental resonances via dynamic change optical constants GST without compromising scattering efficiency. As proof-of-concept, experimentally demonstrate miniaturized control amplitude phase incident light necessary high-contrast switching anomalous to specular beam deflection, respectively. Finally, leverage deep learning-based approach intuitive low-dimensional visualization enhanced range response reconfiguration enabled addition GST. Our findings further substantiate dynamically promising candidates development small-footprint energy harvesting, imaging, signal processing devices.
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