Electrical detection of high-order optical orbital angular momentum
Fuente:
arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866911417480773632 |
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| author | Zhang, Guanyu Meng, Xianghan Cao, Zini Lin, Hai Huang, Shuxin Deng, Minghao Li, Jiaqi Gong, Qihuang Lyu, Guowei |
| author_facet | Zhang, Guanyu Meng, Xianghan Cao, Zini Lin, Hai Huang, Shuxin Deng, Minghao Li, Jiaqi Gong, Qihuang Lyu, Guowei |
| contents | The orbital angular momentum (OAM) of light provides an unbounded set of orthogonal modes for ultrahigh-capacity optical information processing. However, current OAM detection schemes typically rely on light interference or diffraction, which require bulky optical components and pose a major obstacle to on-chip integration. Here, we demonstrate a fully integrated silicon-based photodetector that enables direct electrical detection of light OAM. This photodetector can resolve vortex beams with topological charges from m = -9 to 9, achieving a record-high mode number resolution among on-chip devices. By integrating plasmonic gratings onto the device electrodes, incident vortex beams can be converted into surface plasmon polaritons with OAM-dependent splitting angles, which in turn produce photocurrents that vary monotonically with the OAM order. Further incorporation of a surface dielectric lens can enhance mode resolution, and a split-electrode architecture enables OAM chirality discrimination. Owing to its CMOS-compatibility and spectral scalability, this platform provides a compact and robust solution for integrated OAM detection, opening new opportunities for on-chip optical communication and computing systems based on structured light. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_13691 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Electrical detection of high-order optical orbital angular momentum Zhang, Guanyu Meng, Xianghan Cao, Zini Lin, Hai Huang, Shuxin Deng, Minghao Li, Jiaqi Gong, Qihuang Lyu, Guowei Optics The orbital angular momentum (OAM) of light provides an unbounded set of orthogonal modes for ultrahigh-capacity optical information processing. However, current OAM detection schemes typically rely on light interference or diffraction, which require bulky optical components and pose a major obstacle to on-chip integration. Here, we demonstrate a fully integrated silicon-based photodetector that enables direct electrical detection of light OAM. This photodetector can resolve vortex beams with topological charges from m = -9 to 9, achieving a record-high mode number resolution among on-chip devices. By integrating plasmonic gratings onto the device electrodes, incident vortex beams can be converted into surface plasmon polaritons with OAM-dependent splitting angles, which in turn produce photocurrents that vary monotonically with the OAM order. Further incorporation of a surface dielectric lens can enhance mode resolution, and a split-electrode architecture enables OAM chirality discrimination. Owing to its CMOS-compatibility and spectral scalability, this platform provides a compact and robust solution for integrated OAM detection, opening new opportunities for on-chip optical communication and computing systems based on structured light. |
| title | Electrical detection of high-order optical orbital angular momentum |
| topic | Optics |
| url | https://arxiv.org/abs/2601.13691 |