Exploiting hidden singularity on the surface of the Poincaré sphere
Abstract The classical Pancharatnam-Berry phase, a variant of the geometric phase, arises purely from the modulation of the polarization state of a light beam. Due to its dependence on polarization changes, it cannot be effectively utilized for wavefront shaping in systems that require maintaining a...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-07-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-60956-2 |
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| _version_ | 1849768589011189760 |
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| author | Jinxing Li Aloke Jana Yueyi Yuan Kuang Zhang Shah Nawaz Burokur Patrice Genevet |
| author_facet | Jinxing Li Aloke Jana Yueyi Yuan Kuang Zhang Shah Nawaz Burokur Patrice Genevet |
| author_sort | Jinxing Li |
| collection | DOAJ |
| description | Abstract The classical Pancharatnam-Berry phase, a variant of the geometric phase, arises purely from the modulation of the polarization state of a light beam. Due to its dependence on polarization changes, it cannot be effectively utilized for wavefront shaping in systems that require maintaining a constant (co-polarized) polarization state. Here, we present a novel topologically protected phase modulation mechanism capable of achieving anti-symmetric full 2π phase shifts with near-unity efficiency for two orthogonal co-polarized channels. Compatible with -but distinct from- the dynamic phase, this approach exploits phase circulation around a hidden singularity on the surface of the Poincaré sphere. We validate this concept in the microwave regime through the implementation of multi-layer chiral metasurfaces. This new phase modulation mechanism expands the design toolbox of flat optics for light modulation beyond conventional techniques. |
| format | Article |
| id | doaj-art-4851654dc7a94879ae6eaa887774fdac |
| institution | DOAJ |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-4851654dc7a94879ae6eaa887774fdac2025-08-20T03:03:44ZengNature PortfolioNature Communications2041-17232025-07-011611710.1038/s41467-025-60956-2Exploiting hidden singularity on the surface of the Poincaré sphereJinxing Li0Aloke Jana1Yueyi Yuan2Kuang Zhang3Shah Nawaz Burokur4Patrice Genevet5Department of Microwave Engineering, Harbin Institute of TechnologyDepartment of Physics, Colorado School of MinesDepartment of Microwave Engineering, Harbin Institute of TechnologyDepartment of Microwave Engineering, Harbin Institute of TechnologyLEME, Univ Paris NanterreDepartment of Physics, Colorado School of MinesAbstract The classical Pancharatnam-Berry phase, a variant of the geometric phase, arises purely from the modulation of the polarization state of a light beam. Due to its dependence on polarization changes, it cannot be effectively utilized for wavefront shaping in systems that require maintaining a constant (co-polarized) polarization state. Here, we present a novel topologically protected phase modulation mechanism capable of achieving anti-symmetric full 2π phase shifts with near-unity efficiency for two orthogonal co-polarized channels. Compatible with -but distinct from- the dynamic phase, this approach exploits phase circulation around a hidden singularity on the surface of the Poincaré sphere. We validate this concept in the microwave regime through the implementation of multi-layer chiral metasurfaces. This new phase modulation mechanism expands the design toolbox of flat optics for light modulation beyond conventional techniques.https://doi.org/10.1038/s41467-025-60956-2 |
| spellingShingle | Jinxing Li Aloke Jana Yueyi Yuan Kuang Zhang Shah Nawaz Burokur Patrice Genevet Exploiting hidden singularity on the surface of the Poincaré sphere Nature Communications |
| title | Exploiting hidden singularity on the surface of the Poincaré sphere |
| title_full | Exploiting hidden singularity on the surface of the Poincaré sphere |
| title_fullStr | Exploiting hidden singularity on the surface of the Poincaré sphere |
| title_full_unstemmed | Exploiting hidden singularity on the surface of the Poincaré sphere |
| title_short | Exploiting hidden singularity on the surface of the Poincaré sphere |
| title_sort | exploiting hidden singularity on the surface of the poincare sphere |
| url | https://doi.org/10.1038/s41467-025-60956-2 |
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