Optical trapping core formation and general trapping mechanism in single-beam optical tweezers
The working mechanism of single-beam optical tweezers is revisited using a recently established method. The optical force is split into conservative and nonconservative components, and these components are explicitly calculated for particles in the Rayleigh, Mie and geometrical optics regimes. The r...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ac643a |
| _version_ | 1797748505526140928 |
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| author | Di Huang Pengcheng Wan Ling Zhou Haiqin Guo Ruihuang Zhao Jun Chen Jack Ng Junjie Du |
| author_facet | Di Huang Pengcheng Wan Ling Zhou Haiqin Guo Ruihuang Zhao Jun Chen Jack Ng Junjie Du |
| author_sort | Di Huang |
| collection | DOAJ |
| description | The working mechanism of single-beam optical tweezers is revisited using a recently established method. The optical force is split into conservative and nonconservative components, and these components are explicitly calculated for particles in the Rayleigh, Mie and geometrical optics regimes. The results indicate that optical trapping is attributable to the formation of an ‘optical trapping core’. Stable trapping is achieved when the conservative forces are larger than the nonconservative forces in the core region centered at the beam centers for all particle sizes. According to the conventional understanding, stability is a result of the conservative force overcoming the nonconservative force. In comparison, the concept of the optical trapping core more accurately illustrates the physical mechanism of optical trapping, for not only single-beam optical tweezers but also optical trapping settings. |
| first_indexed | 2024-03-12T16:05:45Z |
| format | Article |
| id | doaj.art-9a5b2718fd0c41779020a6e474c1fbf2 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:05:45Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-9a5b2718fd0c41779020a6e474c1fbf22023-08-09T14:22:08ZengIOP PublishingNew Journal of Physics1367-26302022-01-0124404304310.1088/1367-2630/ac643aOptical trapping core formation and general trapping mechanism in single-beam optical tweezersDi Huang0Pengcheng Wan1Ling Zhou2Haiqin Guo3Ruihuang Zhao4Jun Chen5Jack Ng6Junjie Du7https://orcid.org/0000-0003-4311-1707State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University , Shanghai 200062, People’s Republic of ChinaState Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University , Shanghai 200062, People’s Republic of ChinaState Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University , Shanghai 200062, People’s Republic of ChinaState Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University , Shanghai 200062, People’s Republic of ChinaState Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University , Shanghai 200062, People’s Republic of ChinaState Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Theoretical Physics, Shanxi University , Taiyuan, Shanxi 030006, People’s Republic of China; Collaborative Innovation Center of Extreme Optics, Shanxi University , Taiyuan, Shanxi 030006, People’s Republic of ChinaDepartment of Physics, Southern University of Science and Technology , Shenzhen, Guangdong 518055, People’s Republic of ChinaState Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University , Shanghai 200062, People’s Republic of ChinaThe working mechanism of single-beam optical tweezers is revisited using a recently established method. The optical force is split into conservative and nonconservative components, and these components are explicitly calculated for particles in the Rayleigh, Mie and geometrical optics regimes. The results indicate that optical trapping is attributable to the formation of an ‘optical trapping core’. Stable trapping is achieved when the conservative forces are larger than the nonconservative forces in the core region centered at the beam centers for all particle sizes. According to the conventional understanding, stability is a result of the conservative force overcoming the nonconservative force. In comparison, the concept of the optical trapping core more accurately illustrates the physical mechanism of optical trapping, for not only single-beam optical tweezers but also optical trapping settings.https://doi.org/10.1088/1367-2630/ac643adecomposition of optical forcesMie particlesoptical tweezersoptical trapping core |
| spellingShingle | Di Huang Pengcheng Wan Ling Zhou Haiqin Guo Ruihuang Zhao Jun Chen Jack Ng Junjie Du Optical trapping core formation and general trapping mechanism in single-beam optical tweezers New Journal of Physics decomposition of optical forces Mie particles optical tweezers optical trapping core |
| title | Optical trapping core formation and general trapping mechanism in single-beam optical tweezers |
| title_full | Optical trapping core formation and general trapping mechanism in single-beam optical tweezers |
| title_fullStr | Optical trapping core formation and general trapping mechanism in single-beam optical tweezers |
| title_full_unstemmed | Optical trapping core formation and general trapping mechanism in single-beam optical tweezers |
| title_short | Optical trapping core formation and general trapping mechanism in single-beam optical tweezers |
| title_sort | optical trapping core formation and general trapping mechanism in single beam optical tweezers |
| topic | decomposition of optical forces Mie particles optical tweezers optical trapping core |
| url | https://doi.org/10.1088/1367-2630/ac643a |
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