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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...

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Autores principales: Zhang, Yuquan, Shi, Wei, Shen, Zhe, Man, Zhongsheng, Min, Changjun, Shen, Junfeng, Zhu, Siwei, Urbach, H. Paul, Yuan, Xiaocong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
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.
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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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