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A Plasmonic Spanner for Metal Particle Manipulation
Typically, metal particles are difficult to manipulate with conventional optical vortex (OV) tweezers, because of their strong absorption and scattering. However, it has been shown that the vortex field of surface plasmonic polaritons, called plasmonic vortex (PV), is capable of stable trapping and...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4612544/ https://www.ncbi.nlm.nih.gov/pubmed/26481689 http://dx.doi.org/10.1038/srep15446 |
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author | Zhang, Yuquan Shi, Wei Shen, Zhe Man, Zhongsheng Min, Changjun Shen, Junfeng Zhu, Siwei Urbach, H. Paul Yuan, Xiaocong |
author_facet | Zhang, Yuquan Shi, Wei Shen, Zhe Man, Zhongsheng Min, Changjun Shen, Junfeng Zhu, Siwei Urbach, H. Paul Yuan, Xiaocong |
author_sort | Zhang, Yuquan |
collection | PubMed |
description | Typically, metal particles are difficult to manipulate with conventional optical vortex (OV) tweezers, because of their strong absorption and scattering. However, it has been shown that the vortex field of surface plasmonic polaritons, called plasmonic vortex (PV), is capable of stable trapping and dynamic rotation of metal particles, especially those of mesoscopic and Mie size. To uncover the different physical mechanisms of OV and PV tweezers, we investigated the force distribution and trapping potential of metal particles. In OV tweezers the stronger scattering force causes a positive potential barrier that repels particles, whereas in PV tweezers the dominant gradient force contributes to a negative potential well, resulting in stably trapped particles. Compared with OV, the orbital angular momentum of PV produces an azimuthal scattering force that rotates the trapped particles with more precise radius and position. Our results demonstrate that PV tweezers are superior in manipulation of metal particles. |
format | Online Article Text |
id | pubmed-4612544 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-46125442015-11-02 A Plasmonic Spanner for Metal Particle Manipulation Zhang, Yuquan Shi, Wei Shen, Zhe Man, Zhongsheng Min, Changjun Shen, Junfeng Zhu, Siwei Urbach, H. Paul Yuan, Xiaocong Sci Rep Article Typically, metal particles are difficult to manipulate with conventional optical vortex (OV) tweezers, because of their strong absorption and scattering. However, it has been shown that the vortex field of surface plasmonic polaritons, called plasmonic vortex (PV), is capable of stable trapping and dynamic rotation of metal particles, especially those of mesoscopic and Mie size. To uncover the different physical mechanisms of OV and PV tweezers, we investigated the force distribution and trapping potential of metal particles. In OV tweezers the stronger scattering force causes a positive potential barrier that repels particles, whereas in PV tweezers the dominant gradient force contributes to a negative potential well, resulting in stably trapped particles. Compared with OV, the orbital angular momentum of PV produces an azimuthal scattering force that rotates the trapped particles with more precise radius and position. Our results demonstrate that PV tweezers are superior in manipulation of metal particles. Nature Publishing Group 2015-10-20 /pmc/articles/PMC4612544/ /pubmed/26481689 http://dx.doi.org/10.1038/srep15446 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Zhang, Yuquan Shi, Wei Shen, Zhe Man, Zhongsheng Min, Changjun Shen, Junfeng Zhu, Siwei Urbach, H. Paul Yuan, Xiaocong A Plasmonic Spanner for Metal Particle Manipulation |
title | A Plasmonic Spanner for Metal Particle Manipulation |
title_full | A Plasmonic Spanner for Metal Particle Manipulation |
title_fullStr | A Plasmonic Spanner for Metal Particle Manipulation |
title_full_unstemmed | A Plasmonic Spanner for Metal Particle Manipulation |
title_short | A Plasmonic Spanner for Metal Particle Manipulation |
title_sort | plasmonic spanner for metal particle manipulation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4612544/ https://www.ncbi.nlm.nih.gov/pubmed/26481689 http://dx.doi.org/10.1038/srep15446 |
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