Colloidal density control with Bessel–Gauss beams

Abstract Optical manipulation of colloidal systems is of high interest for both fundamental studies and practical applications. It has been shown that optically induced thermophoresis and nonlinear interactions can significantly affect the properties of dense colloidal media. However, macroscopic sc...

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Autores principales:	Cristian Hernando Acevedo, Ruitao Wu, J. Keith Miller, Eric G. Johnson, Aristide Dogariu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/cc440a9c8d124f13987ebf819656d950
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spelling	oai:doaj.org-article:cc440a9c8d124f13987ebf819656d9502021-12-02T14:58:19ZColloidal density control with Bessel–Gauss beams10.1038/s41598-021-91638-w2045-2322https://doaj.org/article/cc440a9c8d124f13987ebf819656d9502021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-91638-whttps://doaj.org/toc/2045-2322Abstract Optical manipulation of colloidal systems is of high interest for both fundamental studies and practical applications. It has been shown that optically induced thermophoresis and nonlinear interactions can significantly affect the properties of dense colloidal media. However, macroscopic scale phenomena can also be generated at thermal equilibrium. Here, we demonstrate that steady-state variations of particle density can be created over large, three-dimensional regions by appropriately structured external optical fields. We prove analytically and experimentally that an optical vortex beam can dynamically control the spatial density of microscopic particles along the direction of its propagation. We show that these artificial steady-states can be generated at will and can be maintained indefinitely, which can be beneficial for applications such as path clearing and mass transportation.Cristian Hernando AcevedoRuitao WuJ. Keith MillerEric G. JohnsonAristide DogariuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Cristian Hernando Acevedo Ruitao Wu J. Keith Miller Eric G. Johnson Aristide Dogariu Colloidal density control with Bessel–Gauss beams
description	Abstract Optical manipulation of colloidal systems is of high interest for both fundamental studies and practical applications. It has been shown that optically induced thermophoresis and nonlinear interactions can significantly affect the properties of dense colloidal media. However, macroscopic scale phenomena can also be generated at thermal equilibrium. Here, we demonstrate that steady-state variations of particle density can be created over large, three-dimensional regions by appropriately structured external optical fields. We prove analytically and experimentally that an optical vortex beam can dynamically control the spatial density of microscopic particles along the direction of its propagation. We show that these artificial steady-states can be generated at will and can be maintained indefinitely, which can be beneficial for applications such as path clearing and mass transportation.
format	article
author	Cristian Hernando Acevedo Ruitao Wu J. Keith Miller Eric G. Johnson Aristide Dogariu
author_facet	Cristian Hernando Acevedo Ruitao Wu J. Keith Miller Eric G. Johnson Aristide Dogariu
author_sort	Cristian Hernando Acevedo
title	Colloidal density control with Bessel–Gauss beams
title_short	Colloidal density control with Bessel–Gauss beams
title_full	Colloidal density control with Bessel–Gauss beams
title_fullStr	Colloidal density control with Bessel–Gauss beams
title_full_unstemmed	Colloidal density control with Bessel–Gauss beams
title_sort	colloidal density control with bessel–gauss beams
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/cc440a9c8d124f13987ebf819656d950
work_keys_str_mv	AT cristianhernandoacevedo colloidaldensitycontrolwithbesselgaussbeams AT ruitaowu colloidaldensitycontrolwithbesselgaussbeams AT jkeithmiller colloidaldensitycontrolwithbesselgaussbeams AT ericgjohnson colloidaldensitycontrolwithbesselgaussbeams AT aristidedogariu colloidaldensitycontrolwithbesselgaussbeams
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Colloidal density control with Bessel–Gauss beams

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