Anti-aliased metasurfaces beyond the Nyquist limit
Abstract Sampling is a pivotal element in the design of metasurfaces, enabling a broad spectrum of applications. Despite its flexibility, sampling can result in reduced efficiency and unintended diffractions, which are more pronounced at high numerical aperture or shorter wavelengths, e.g. ultraviol...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-01-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-55095-z |
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| _version_ | 1841544541966958592 |
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| author | Seokwoo Kim Joohoon Kim Kyungtae Kim Minsu Jeong Junsuk Rho |
| author_facet | Seokwoo Kim Joohoon Kim Kyungtae Kim Minsu Jeong Junsuk Rho |
| author_sort | Seokwoo Kim |
| collection | DOAJ |
| description | Abstract Sampling is a pivotal element in the design of metasurfaces, enabling a broad spectrum of applications. Despite its flexibility, sampling can result in reduced efficiency and unintended diffractions, which are more pronounced at high numerical aperture or shorter wavelengths, e.g. ultraviolet spectrum. Prevailing metasurface research has often relied on the conventional Nyquist sampling theorem to assess sampling appropriateness, however, our findings reveal that the Nyquist criterion is insufficient guidance for sampling in metasurface. Specifically, we find that the performance of a metasurface is significantly correlated to the geometric relationship between the spectrum morphology and sampling lattice. Based on lattice-based diffraction analysis, we demonstrate several anti-aliasing strategies from visible to ultraviolet regimes. These approaches significantly reduce aliasing phenomena occurring in high numerical aperture metasurfaces. Our findings not only deepen the understanding in phase gradient metasurface but also pave the way for high numerical aperture operation down to the ultraviolet spectrum. |
| format | Article |
| id | doaj-art-bd98a0f318434a5abbb2d137a60cbe40 |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-bd98a0f318434a5abbb2d137a60cbe402025-01-12T12:29:49ZengNature PortfolioNature Communications2041-17232025-01-0116111010.1038/s41467-024-55095-zAnti-aliased metasurfaces beyond the Nyquist limitSeokwoo Kim0Joohoon Kim1Kyungtae Kim2Minsu Jeong3Junsuk Rho4Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH)Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH)Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH)Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH)Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH)Abstract Sampling is a pivotal element in the design of metasurfaces, enabling a broad spectrum of applications. Despite its flexibility, sampling can result in reduced efficiency and unintended diffractions, which are more pronounced at high numerical aperture or shorter wavelengths, e.g. ultraviolet spectrum. Prevailing metasurface research has often relied on the conventional Nyquist sampling theorem to assess sampling appropriateness, however, our findings reveal that the Nyquist criterion is insufficient guidance for sampling in metasurface. Specifically, we find that the performance of a metasurface is significantly correlated to the geometric relationship between the spectrum morphology and sampling lattice. Based on lattice-based diffraction analysis, we demonstrate several anti-aliasing strategies from visible to ultraviolet regimes. These approaches significantly reduce aliasing phenomena occurring in high numerical aperture metasurfaces. Our findings not only deepen the understanding in phase gradient metasurface but also pave the way for high numerical aperture operation down to the ultraviolet spectrum.https://doi.org/10.1038/s41467-024-55095-z |
| spellingShingle | Seokwoo Kim Joohoon Kim Kyungtae Kim Minsu Jeong Junsuk Rho Anti-aliased metasurfaces beyond the Nyquist limit Nature Communications |
| title | Anti-aliased metasurfaces beyond the Nyquist limit |
| title_full | Anti-aliased metasurfaces beyond the Nyquist limit |
| title_fullStr | Anti-aliased metasurfaces beyond the Nyquist limit |
| title_full_unstemmed | Anti-aliased metasurfaces beyond the Nyquist limit |
| title_short | Anti-aliased metasurfaces beyond the Nyquist limit |
| title_sort | anti aliased metasurfaces beyond the nyquist limit |
| url | https://doi.org/10.1038/s41467-024-55095-z |
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