Fundamental constraints on particle tracking with optical tweezers

Taylor, Michael A., Knittel, Joachim and Bowen, Warwick P. (2013) Fundamental constraints on particle tracking with optical tweezers. New Journal of Physics, 15 023018.1-023018.10. doi:10.1088/1367-2630/15/2/023018

Author Taylor, Michael A.
Knittel, Joachim
Bowen, Warwick P.
Title Fundamental constraints on particle tracking with optical tweezers
Journal name New Journal of Physics   Check publisher's open access policy
ISSN 1367-2630
Publication date 2013-02-01
Year available 2013
Sub-type Article (original research)
DOI 10.1088/1367-2630/15/2/023018
Open Access Status DOI
Volume 15
Start page 023018.1
End page 023018.10
Total pages 10
Place of publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Language eng
Formatted abstract
A general quantum limit to the sensitivity of particle position measurements is derived following the simple principle of the Heisenberg microscope. The value of this limit is calculated for particles in the Rayleigh and Mie scattering regimes, and with parameters which are relevant to optical tweezers experiments. The minimum power required to observe the zero-point motion of a levitating bead is also calculated, with the optimal particle diameter always smaller than the wavelength. We show that recent optical tweezers experiments are within two orders of magnitude of quantum limited sensitivity, suggesting that quantum optical resources may soon play an important role in high sensitivity tracking applications.
Keyword Brownian Motion
Living Cells
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2014 Collection
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 16 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 10 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Sun, 17 Mar 2013, 11:49:00 EST by System User on behalf of School of Mathematics & Physics