Long-Distance Axial Trapping with Focused Annular Laser Beams

Focusing an annular laser beam can improve the axial trapping efficiency due to the reduction of the scattering force, which enables the use of a lower numerical aperture (NA) objective lens with a long working distance to trap particles in deeper aqueous medium. In this paper, we present an axicon-...

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Detalles Bibliográficos
Autores principales: Lei, Ming, Li, Ze, Yan, Shaohui, Yao, Baoli, Dan, Dan, Qi, Yujiao, Qian, Jia, Yang, Yanlong, Gao, Peng, Ye, Tong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2013
Materias:
Research Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3591451/
https://www.ncbi.nlm.nih.gov/pubmed/23505449
http://dx.doi.org/10.1371/journal.pone.0057984
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author Lei, Ming
Li, Ze
Yan, Shaohui
Yao, Baoli
Dan, Dan
Qi, Yujiao
Qian, Jia
Yang, Yanlong
Gao, Peng
Ye, Tong
author_facet Lei, Ming
Li, Ze
Yan, Shaohui
Yao, Baoli
Dan, Dan
Qi, Yujiao
Qian, Jia
Yang, Yanlong
Gao, Peng
Ye, Tong
author_sort Lei, Ming
collection PubMed
description Focusing an annular laser beam can improve the axial trapping efficiency due to the reduction of the scattering force, which enables the use of a lower numerical aperture (NA) objective lens with a long working distance to trap particles in deeper aqueous medium. In this paper, we present an axicon-to-axicon scheme for producing parallel annular beams with the advantages of higher efficiency compared with the obstructed beam approach. The validity of the scheme is verified by the observation of a stable trapping of silica microspheres with relatively low NA microscope objective lenses (NA = 0.6 and 0.45), and the axial trapping depth of 5 mm is demonstrated in experiment.
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spelling pubmed-35914512013-03-15 Long-Distance Axial Trapping with Focused Annular Laser Beams Lei, Ming Li, Ze Yan, Shaohui Yao, Baoli Dan, Dan Qi, Yujiao Qian, Jia Yang, Yanlong Gao, Peng Ye, Tong PLoS One Research Article Focusing an annular laser beam can improve the axial trapping efficiency due to the reduction of the scattering force, which enables the use of a lower numerical aperture (NA) objective lens with a long working distance to trap particles in deeper aqueous medium. In this paper, we present an axicon-to-axicon scheme for producing parallel annular beams with the advantages of higher efficiency compared with the obstructed beam approach. The validity of the scheme is verified by the observation of a stable trapping of silica microspheres with relatively low NA microscope objective lenses (NA = 0.6 and 0.45), and the axial trapping depth of 5 mm is demonstrated in experiment. Public Library of Science 2013-03-07 /pmc/articles/PMC3591451/ /pubmed/23505449 http://dx.doi.org/10.1371/journal.pone.0057984 Text en © 2013 Lei et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Lei, Ming
Li, Ze
Yan, Shaohui
Yao, Baoli
Dan, Dan
Qi, Yujiao
Qian, Jia
Yang, Yanlong
Gao, Peng
Ye, Tong
Long-Distance Axial Trapping with Focused Annular Laser Beams
title Long-Distance Axial Trapping with Focused Annular Laser Beams
title_full Long-Distance Axial Trapping with Focused Annular Laser Beams
title_fullStr Long-Distance Axial Trapping with Focused Annular Laser Beams
title_full_unstemmed Long-Distance Axial Trapping with Focused Annular Laser Beams
title_short Long-Distance Axial Trapping with Focused Annular Laser Beams
title_sort long-distance axial trapping with focused annular laser beams
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3591451/
https://www.ncbi.nlm.nih.gov/pubmed/23505449
http://dx.doi.org/10.1371/journal.pone.0057984
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