Shape-induced force fields in optical trapping

Phillips, D. B., Padgett, M. J., Hanna, S., Ho, Y.-L. D., Carberry, D. M., Miles, M. J. and Simpson S.H. (2014) Shape-induced force fields in optical trapping. Nature Photonics, 8 5: 400-405. doi:10.1038/nphoton.2014.74


Author Phillips, D. B.
Padgett, M. J.
Hanna, S.
Ho, Y.-L. D.
Carberry, D. M.
Miles, M. J.
Simpson S.H.
Title Shape-induced force fields in optical trapping
Journal name Nature Photonics   Check publisher's open access policy
ISSN 1749-4885
1749-4893
Publication date 2014
Year available 2014
Sub-type Article (original research)
DOI 10.1038/nphoton.2014.74
Open Access Status
Volume 8
Issue 5
Start page 400
End page 405
Total pages 6
Place of publication London, United Kingdom
Publisher Nature Publishing Group
Collection year 2015
Language eng
Abstract Advances in optical tweezers, coupled with the proliferation of two-photon polymerization systems, mean that it is now becoming routine to fabricate and trap non-spherical particles. The shaping of both light beams and particles allows fine control over the flow of momentum from the optical to mechanical regimes. However, understanding and predicting the behaviour of such systems is highly complex in comparison with the traditional optically trapped microsphere. In this Article, we present a conceptually new and simple approach based on the nature of the optical force density. We illustrate the method through the design and fabrication of a shaped particle capable of acting as a passive force clamp, and we demonstrate its use as an optically trapped probe for imaging surface topography. Further applications of the design rules highlighted here may lead to new sensors for probing biomolecule mechanics, as well as to the development of optically actuated micromachines.
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 2015 Collection
 
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