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Direct measurement of the nonconservative force field generated by optical tweezers

SYSNO ASEP	0333705
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Direct measurement of the nonconservative force field generated by optical tweezers
Author(s)	Wu, P. (US) Huang, R. (US) Tischer, Ch. (DE) Jonáš, Alexandr (UPT-D)_{RID, SAI, ORCID} Florin, E. L. (DE)
Number of authors	5
Source Title	Physical Review Letters. - : American Physical Society - ISSN 0031-9007 Roč. 103, č. 10 (2009), 108101:1-4
Number of pages	4 s.
Language	eng - English
Country	US - United States
Keywords	manipulation ; molecules ; particles ; equality ; trap
Subject RIV	BH - Optics, Masers, Lasers
CEZ	AV0Z20650511 - UPT-D (2005-2011)
UT WOS	000269639800057
DOI	10.1103/PhysRevLett.103.108101
Annotation	The force field of optical tweezers is commonly assumed to be conservative, neglecting the complex action of the scattering force. Using a novel method that extracts local forces from trajectories of an optically trapped particle, we measure the three-dimensional force field experienced by a Rayleigh particle with 10 nm spatial resolution and femtonewton precision in force. We find that the force field is nonconservative with the nonconservative component increasing radially away from the optical axis, in agreement with the Gaussian beam model of the optical trap.
Workplace	Institute of Scientific Instruments
Contact	Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178
Year of Publishing	2010

Number of the records: 1