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- W4308364984 abstract "All-dielectric metasurfaces provide unique solutions for advanced wavefront manipulation of light with complete control of amplitude and phase at sub-wavelength scales. One limitation, however, for most of these devices is the lack of any post-fabrication tunability of their response. To break this limit, a promising approach is employing phase-change materials (PCMs), which provide fast, low energy, and non-volatile means to endow metasurfaces with a switching mechanism. In this regard, great advancements have been done in the mid-infrared and near-infrared spectrum using different chalcogenides. In the visible spectral range, however, very few devices have demonstrated full phase manipulation, high efficiencies, and reversible optical modulation. In this work, a programmable all-dielectric Huygens’ metasurface made of antimony sulfide (Sb2S3) PCM is experimentally demonstrated, a low loss and high-index material in the visible spectral range with a large contrast (≈0.5) between its amorphous and crystalline states. ≈2π phase modulation is shown with high associated transmittance and it is used to create programmable beam-steering devices. These novel chalcogenide PCM metasurfaces have the potential to emerge as a platform for next-generation spatial light modulators and to impact application areas such as programmable and adaptive flat optics, light detection and ranging (LiDAR), and many more." @default.
- W4308364984 created "2022-11-11" @default.
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- W4308364984 date "2022-11-21" @default.
- W4308364984 modified "2023-10-01" @default.
- W4308364984 title "Programmable Wavefront Control in the Visible Spectrum Using Low‐Loss Chalcogenide Phase‐Change Metasurfaces" @default.
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- W4308364984 doi "https://doi.org/10.1002/adma.202205367" @default.
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