Force sensing with a shaped dielectric micro-tool

Phillips, D. B., Simpson, S. H., Grieve, J. A., Bowman, R., Gibson, G. M., Padgett, M. J., Rarity, J. G., Hanna, S., Miles, M. J. and Carberry, D. M. (2012) Force sensing with a shaped dielectric micro-tool. EPL, 99 5: . doi:10.1209/0295-5075/99/58004

Author Phillips, D. B.
Simpson, S. H.
Grieve, J. A.
Bowman, R.
Gibson, G. M.
Padgett, M. J.
Rarity, J. G.
Hanna, S.
Miles, M. J.
Carberry, D. M.
Title Force sensing with a shaped dielectric micro-tool
Journal name EPL   Check publisher's open access policy
ISSN 0295-5075
Publication date 2012-09-12
Year available 2012
Sub-type Article (original research)
DOI 10.1209/0295-5075/99/58004
Open Access Status Not Open Access
Volume 99
Issue 5
Total pages 6
Place of publication Les Ulis, France
Publisher EDP Sciences
Collection year 2013
Language eng
Formatted abstract
We analyse the thermal motion of a holographically trapped non-spherical force probe, capable of interrogating arbitrary samples with nanometer resolution. High speed video stereo-microscopy is used to track the translational and rotational coordinates of the micro-tool in three dimensions, and the complete 6×6 stiffness matrix for the system is determined using equipartition theorem. The Brownian motion of the extended structure is described in terms of a continuous distribution of thermal ellipsoids. A centre of optical stress, at which rotational and translational motion is uncoupled, is observed and controlled. Once calibrated, the micro-tool is deployed in two modes of operation: as a force sensor with < 150 femto-Newton sensitivity, and in a novel form of photonic force microscopy.
Keyword Optical tweezers
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Article # 58004

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 21 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 22 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Tue, 30 Apr 2013, 16:19:00 EST by System User on behalf of Physics