Optimizing phase to enhance optical trap stiffness

Abstract Phase optimization offers promising capabilities in optical tweezers, allowing huge increases in the applied forces, trap stiff-ness, or measurement sensitivity. One key obstacle to potential applications is the lack of an efficient algorithm to compute an optimized phase profile, with enha...

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Autor principal:	Michael A. Taylor
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f08a3dd1da33426dbee7266cc845296e
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spelling	oai:doaj.org-article:f08a3dd1da33426dbee7266cc845296e2021-12-02T12:31:51ZOptimizing phase to enhance optical trap stiffness10.1038/s41598-017-00762-z2045-2322https://doaj.org/article/f08a3dd1da33426dbee7266cc845296e2017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00762-zhttps://doaj.org/toc/2045-2322Abstract Phase optimization offers promising capabilities in optical tweezers, allowing huge increases in the applied forces, trap stiff-ness, or measurement sensitivity. One key obstacle to potential applications is the lack of an efficient algorithm to compute an optimized phase profile, with enhanced trapping experiments relying on slow programs that would take up to a week to converge. Here we introduce an algorithm that reduces the wait from days to minutes. We characterize the achievable in-crease in trap stiffness and its dependence on particle size, refractive index, and optical polarization. We further show that phase-only control can achieve almost all of the enhancement possible with full wavefront shaping; for instance phase control allows 62 times higher trap stiffness for 10 μm silica spheres in water, while amplitude control and non-trivial polarization further increase this by 1.26 and 1.01 respectively. This algorithm will facilitate future applications in optical trapping, and more generally in wavefront optimization.Michael A. TaylorNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Michael A. Taylor Optimizing phase to enhance optical trap stiffness
description	Abstract Phase optimization offers promising capabilities in optical tweezers, allowing huge increases in the applied forces, trap stiff-ness, or measurement sensitivity. One key obstacle to potential applications is the lack of an efficient algorithm to compute an optimized phase profile, with enhanced trapping experiments relying on slow programs that would take up to a week to converge. Here we introduce an algorithm that reduces the wait from days to minutes. We characterize the achievable in-crease in trap stiffness and its dependence on particle size, refractive index, and optical polarization. We further show that phase-only control can achieve almost all of the enhancement possible with full wavefront shaping; for instance phase control allows 62 times higher trap stiffness for 10 μm silica spheres in water, while amplitude control and non-trivial polarization further increase this by 1.26 and 1.01 respectively. This algorithm will facilitate future applications in optical trapping, and more generally in wavefront optimization.
format	article
author	Michael A. Taylor
author_facet	Michael A. Taylor
author_sort	Michael A. Taylor
title	Optimizing phase to enhance optical trap stiffness
title_short	Optimizing phase to enhance optical trap stiffness
title_full	Optimizing phase to enhance optical trap stiffness
title_fullStr	Optimizing phase to enhance optical trap stiffness
title_full_unstemmed	Optimizing phase to enhance optical trap stiffness
title_sort	optimizing phase to enhance optical trap stiffness
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/f08a3dd1da33426dbee7266cc845296e
work_keys_str_mv	AT michaelataylor optimizingphasetoenhanceopticaltrapstiffness
_version_	1718394252591890432

Optimizing phase to enhance optical trap stiffness

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