Additive and Subtractive Color Filters Based on Birefringent Dielectric Metasurfaces
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866913161575137280 |
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| author | Červinka, Ondřej Ligmajer, Filip Brunn, Ondřej Horáček, Miroslav Krátký, Stanislav Šikola, Tomáš |
| author_facet | Červinka, Ondřej Ligmajer, Filip Brunn, Ondřej Horáček, Miroslav Krátký, Stanislav Šikola, Tomáš |
| contents | Dielectric metasurfaces offer a path to high-efficiency optical components at the sub-wavelength scale. In this work, we utilize the wavelength-dependent birefringence of TiO2 nanopillars to create transmissive color filters with switchable spectral responses. We demonstrate that the same physical nanostructure array can function as either an additive (band-pass) or a subtractive (band-stop) filter solely by rotating an external polarizer. The metasurface was fabricated via a modified damascene process, enabling high-aspect-ratio structures with spatial resolutions down to 250 nm. The filters achieve transmission efficiencies of 70% tailorable across the entire visible spectrum, avoiding the ohmic losses typical of plasmonic alternatives. This approach provides a tunable, high-efficiency platform offering a versatile and compact solution for next-generation high-resolution imaging systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_25881 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Additive and Subtractive Color Filters Based on Birefringent Dielectric Metasurfaces Červinka, Ondřej Ligmajer, Filip Brunn, Ondřej Horáček, Miroslav Krátký, Stanislav Šikola, Tomáš Optics Dielectric metasurfaces offer a path to high-efficiency optical components at the sub-wavelength scale. In this work, we utilize the wavelength-dependent birefringence of TiO2 nanopillars to create transmissive color filters with switchable spectral responses. We demonstrate that the same physical nanostructure array can function as either an additive (band-pass) or a subtractive (band-stop) filter solely by rotating an external polarizer. The metasurface was fabricated via a modified damascene process, enabling high-aspect-ratio structures with spatial resolutions down to 250 nm. The filters achieve transmission efficiencies of 70% tailorable across the entire visible spectrum, avoiding the ohmic losses typical of plasmonic alternatives. This approach provides a tunable, high-efficiency platform offering a versatile and compact solution for next-generation high-resolution imaging systems. |
| title | Additive and Subtractive Color Filters Based on Birefringent Dielectric Metasurfaces |
| topic | Optics |
| url | https://arxiv.org/abs/2605.25881 |