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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2506.17167 |
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| _version_ | 1866908414986158080 |
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| author | Liu, Ting-Ting Ding, Shi-Hui Li, Chun-Yu Liu, Hui Zhu, Zhi-Han Chen, Peng Lu, Yan-Qing |
| author_facet | Liu, Ting-Ting Ding, Shi-Hui Li, Chun-Yu Liu, Hui Zhu, Zhi-Han Chen, Peng Lu, Yan-Qing |
| contents | Nonlinear optics is crucial for shaping the spatial structure of shortwave light and its interactions with matter, but achieving this through simple harmonic generation with a single pump is challenging. This study demonstrates nonlinear spin-orbit conversion using spin-dependent pump shaping via geometric phase, allowing the direct creation of desired structured harmonic waves from a Gaussian pump beam. By using the liquid-crystal flat optical elements fabricated with photoalignment, we experimentally produce higher-order cylindrically vectorial modes in second harmonic fields. We examine the vectorial spatial wavefunctions, their propagation invariance, and nonlinear spin-orbit conversion. Our results provide an efficient method for full structuring nonlinear light in broader harmonic systems, with significant applications in laser micromachining and high-energy physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_17167 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Structured Harmonic Generation via Geometric Phase Enabled Pump Shaping Liu, Ting-Ting Ding, Shi-Hui Li, Chun-Yu Liu, Hui Zhu, Zhi-Han Chen, Peng Lu, Yan-Qing Optics Nonlinear optics is crucial for shaping the spatial structure of shortwave light and its interactions with matter, but achieving this through simple harmonic generation with a single pump is challenging. This study demonstrates nonlinear spin-orbit conversion using spin-dependent pump shaping via geometric phase, allowing the direct creation of desired structured harmonic waves from a Gaussian pump beam. By using the liquid-crystal flat optical elements fabricated with photoalignment, we experimentally produce higher-order cylindrically vectorial modes in second harmonic fields. We examine the vectorial spatial wavefunctions, their propagation invariance, and nonlinear spin-orbit conversion. Our results provide an efficient method for full structuring nonlinear light in broader harmonic systems, with significant applications in laser micromachining and high-energy physics. |
| title | Structured Harmonic Generation via Geometric Phase Enabled Pump Shaping |
| topic | Optics |
| url | https://arxiv.org/abs/2506.17167 |