How can light be efficiently manipulated below the single-pixel level? An answer is now provided using near-field interactions for nanopillars in a metasurface — phase gradients in the gaps between the nanopillars constitute a new degree of freedom that enables efficient wavefront control at the nanoscale.
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References
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This is a summary of: Chen, Q. et al. Highly efficient vortex generation at the nanoscale. Nat. Nanotechnol. https://doi.org/10.1038/s41565-024-01636-y (2024).
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Light manipulation with sub-pixel wavefront control using gap phases. Nat. Nanotechnol. (2024). https://doi.org/10.1038/s41565-024-01640-2
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DOI: https://doi.org/10.1038/s41565-024-01640-2
