Dynamics of dual-orbit rotations of nanoparticles induced by spin–orbit coupling
Spin–orbit coupling (SOC) in tightly focused optical fields offers a powerful mechanism for manipulating the complex motion of particles. However, to date, such a mechanism has only been applied to the single-orbit motion for particles, while multi-orbital dynamics have not yet been experimentally d...
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| Format: | Article |
| Language: | English |
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De Gruyter
2025-01-01
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| Series: | Nanophotonics |
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| Online Access: | https://doi.org/10.1515/nanoph-2024-0586 |
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| author | Zhang Yu Lin Qian Zhuang Zikuan Lin Fei Hong Ling Che Zhen Zhuo Linqing Li Yongyao Zhang Li Zhao Dongxu |
| author_facet | Zhang Yu Lin Qian Zhuang Zikuan Lin Fei Hong Ling Che Zhen Zhuo Linqing Li Yongyao Zhang Li Zhao Dongxu |
| author_sort | Zhang Yu |
| collection | DOAJ |
| description | Spin–orbit coupling (SOC) in tightly focused optical fields offers a powerful mechanism for manipulating the complex motion of particles. However, to date, such a mechanism has only been applied to the single-orbit motion for particles, while multi-orbital dynamics have not yet been experimentally demonstrated. Here, the theoretical and experimental realization of dual-orbit rotational dynamics of nanoparticles in a tightly focused circularly polarized Laguerre-Gaussian beam is reported. Analyses reveal that the dual-orbit rotation of nanoparticles originates from SOC in a tightly focused vortex beam, with the motion velocity and direction determined by the topological charge of the beam. Experimentally, the dual-orbit rotation of polystyrene nanoparticles was observed for the first time using an inverted optical tweezer. In addition, the rotation velocity showed a clear linear dependence on the topological charge of the incident beam. This work reveals the pivotal role of SOC in enabling precise dual-orbit control at the nanoscale, paving the way for applications in optical sorting, grinding and delivery of microparticles. |
| format | Article |
| id | doaj-art-3ee123087c5a4d95b56b60beed030008 |
| institution | OA Journals |
| issn | 2192-8614 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-3ee123087c5a4d95b56b60beed0300082025-08-20T02:26:09ZengDe GruyterNanophotonics2192-86142025-01-0114683384310.1515/nanoph-2024-0586Dynamics of dual-orbit rotations of nanoparticles induced by spin–orbit couplingZhang Yu0Lin Qian1Zhuang Zikuan2Lin Fei3Hong Ling4Che Zhen5Zhuo Linqing6Li Yongyao7Zhang Li8Zhao Dongxu9Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan, Guangdong528225, ChinaGuangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan, Guangdong528225, ChinaGuangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan, Guangdong528225, ChinaGuangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan, Guangdong528225, ChinaGuangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan, Guangdong528225, ChinaGuangdong Science and Technology Infrastructure Center, Guangzhou, Guangdong510033, ChinaSchool of Electronics and Information, Guangdong Polytechnic Normal University, Guangzhou, Guangdong510665, ChinaGuangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan, Guangdong528225, ChinaGuangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan, Guangdong528225, ChinaGuangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan, Guangdong528225, ChinaSpin–orbit coupling (SOC) in tightly focused optical fields offers a powerful mechanism for manipulating the complex motion of particles. However, to date, such a mechanism has only been applied to the single-orbit motion for particles, while multi-orbital dynamics have not yet been experimentally demonstrated. Here, the theoretical and experimental realization of dual-orbit rotational dynamics of nanoparticles in a tightly focused circularly polarized Laguerre-Gaussian beam is reported. Analyses reveal that the dual-orbit rotation of nanoparticles originates from SOC in a tightly focused vortex beam, with the motion velocity and direction determined by the topological charge of the beam. Experimentally, the dual-orbit rotation of polystyrene nanoparticles was observed for the first time using an inverted optical tweezer. In addition, the rotation velocity showed a clear linear dependence on the topological charge of the incident beam. This work reveals the pivotal role of SOC in enabling precise dual-orbit control at the nanoscale, paving the way for applications in optical sorting, grinding and delivery of microparticles.https://doi.org/10.1515/nanoph-2024-0586spin–orbit couplingorbital angular momentumoptical manipulationoptical force |
| spellingShingle | Zhang Yu Lin Qian Zhuang Zikuan Lin Fei Hong Ling Che Zhen Zhuo Linqing Li Yongyao Zhang Li Zhao Dongxu Dynamics of dual-orbit rotations of nanoparticles induced by spin–orbit coupling Nanophotonics spin–orbit coupling orbital angular momentum optical manipulation optical force |
| title | Dynamics of dual-orbit rotations of nanoparticles induced by spin–orbit coupling |
| title_full | Dynamics of dual-orbit rotations of nanoparticles induced by spin–orbit coupling |
| title_fullStr | Dynamics of dual-orbit rotations of nanoparticles induced by spin–orbit coupling |
| title_full_unstemmed | Dynamics of dual-orbit rotations of nanoparticles induced by spin–orbit coupling |
| title_short | Dynamics of dual-orbit rotations of nanoparticles induced by spin–orbit coupling |
| title_sort | dynamics of dual orbit rotations of nanoparticles induced by spin orbit coupling |
| topic | spin–orbit coupling orbital angular momentum optical manipulation optical force |
| url | https://doi.org/10.1515/nanoph-2024-0586 |
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