Generation of robust spatiotemporal optical vortices with transverse orbital angular momentum beyond $10^2$
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2021
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| _version_ | 1866914675054084096 |
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| author | Chen, Wei Zhang, Wang Liu, Yuan Meng, Fan-Chao Dudley, John M. Lu, Yan-Qing |
| author_facet | Chen, Wei Zhang, Wang Liu, Yuan Meng, Fan-Chao Dudley, John M. Lu, Yan-Qing |
| contents | Recently, photons have been observed to possess transverse orbital angular momentum (OAM); however, it is unclear as whether they can hold a transverse OAM higher than 1. Here, we theoretically and experimentally demonstrate that high-order spatiotemporal Bessel optical vortices (STBOVs) can stably carry transverse OAM even beyond $10^2$. Through the inverse design of the spiral phase, an STBOV of any order can be controllably generated using a 4f pulse shaper. In contrast to conventional longitudinal OAM, the vector direction of the transverse OAM can be distinguished by the unique time-symmetrical evolution of STBOVs. More interestingly, the stability of STBOVs improves with their increasing orders owing to enhanced space-time coupling, making these beams particularly suitable for the generation of ultra-high transverse OAM. Our work paves the way for further research and application of this unique OAM of photons. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2108_13185 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Generation of robust spatiotemporal optical vortices with transverse orbital angular momentum beyond $10^2$ Chen, Wei Zhang, Wang Liu, Yuan Meng, Fan-Chao Dudley, John M. Lu, Yan-Qing Optics Recently, photons have been observed to possess transverse orbital angular momentum (OAM); however, it is unclear as whether they can hold a transverse OAM higher than 1. Here, we theoretically and experimentally demonstrate that high-order spatiotemporal Bessel optical vortices (STBOVs) can stably carry transverse OAM even beyond $10^2$. Through the inverse design of the spiral phase, an STBOV of any order can be controllably generated using a 4f pulse shaper. In contrast to conventional longitudinal OAM, the vector direction of the transverse OAM can be distinguished by the unique time-symmetrical evolution of STBOVs. More interestingly, the stability of STBOVs improves with their increasing orders owing to enhanced space-time coupling, making these beams particularly suitable for the generation of ultra-high transverse OAM. Our work paves the way for further research and application of this unique OAM of photons. |
| title | Generation of robust spatiotemporal optical vortices with transverse orbital angular momentum beyond $10^2$ |
| topic | Optics |
| url | https://arxiv.org/abs/2108.13185 |