| Title: |
Dynamics of dual-orbit rotations of nanoparticles induced by spin–orbit coupling |
| Authors: |
Zhang, Yu; Lin, Qian; Zhuang, Zikuan; Lin, Fei; Hong, Ling; Che, Zhen; Zhuo, Linqing; Li, Yongyao; Zhang, Li; Zhao, Dongxu |
| Contributors: |
Research Fund of Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology; Introduction of Talents Project of Guangdong Polytechnic Normal University of China; National Natural Science Foundation of China; Basic and Applied Basic Research Foundation of Guangdong Province |
| Source: |
Nanophotonics ; volume 14, issue 6, page 833-843 ; ISSN 2192-8614 |
| Publisher Information: |
Walter de Gruyter GmbH |
| Publication Year: |
2025 |
| 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. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1515/nanoph-2024-0586 |
| DOI: |
10.1515/nanoph-2024-0586/xml |
| DOI: |
10.1515/nanoph-2024-0586/pdf |
| Availability: |
https://doi.org/10.1515/nanoph-2024-0586; https://www.degruyter.com/document/doi/10.1515/nanoph-2024-0586/xml; https://www.degruyter.com/document/doi/10.1515/nanoph-2024-0586/pdf |
| Rights: |
http://creativecommons.org/licenses/by/4.0 |
| Accession Number: |
edsbas.BA2BC789 |
| Database: |
BASE |