Enhanced optical trapping via structured scattering

Taylor, Michael A., Waleed, Muhammad., Stilgoe, Alexander B., Rubinsztein-Dunlop, Halina. and Bowen, Warwick P. (2015) Enhanced optical trapping via structured scattering. Nature Photonics, 9 10: 669-673. doi:10.1038/nphoton.2015.160


Author Taylor, Michael A.
Waleed, Muhammad.
Stilgoe, Alexander B.
Rubinsztein-Dunlop, Halina.
Bowen, Warwick P.
Title Enhanced optical trapping via structured scattering
Journal name Nature Photonics   Check publisher's open access policy
ISSN 1749-4893
1749-4885
Publication date 2015-08-31
Year available 2015
Sub-type Article (original research)
DOI 10.1038/nphoton.2015.160
Open Access Status Not Open Access
Volume 9
Issue 10
Start page 669
End page 673
Total pages 4
Place of publication London, United Kingdom
Publisher Nature Publishing Group
Language eng
Subject 2504 Electronic, Optical and Magnetic Materials
3107 Atomic and Molecular Physics, and Optics
Abstract Interferometry can completely redirect light, providing the potential for strong and controllable optical forces. However, small particles do not naturally act like interferometric beamsplitters and the optical scattering from them is not generally thought to allow efficient interference. Instead, optical trapping is typically achieved via deflection of the incident field. Here, we show that a suitably structured incident field can achieve beamsplitter-like interactions with scattering particles. The resulting trap offers order-of-magnitude higher stiffness than the usual Gaussian trap in one axis, even when constrained to phase-only structuring. We demonstrate trapping of 3.5-10.0 mu m silica spheres, achieving a stiffness up to 27.5 +/- 4.1 times higher than was possible using Gaussian traps as well as a two-orders-of-magnitude higher measured signal-to-noise ratio. These results are highly relevant to many applications, including cellular manipulation(1,2), fluid dynamics(3,4,) micro-robotics(5) and tests of fundamental physics(6,7).
Formatted abstract
Interferometry can completely redirect light, providing the potential for strong and controllable optical forces. However, small particles do not naturally act like interferometric beamsplitters and the optical scattering from them is not generally thought to allow efficient interference. Instead, optical trapping is typically achieved via deflection of the incident field. Here, we show that a suitably structured incident field can achieve beamsplitter-like interactions with scattering particles. The resulting trap offers order-of-magnitude higher stiffness than the usual Gaussian trap in one axis, even when constrained to phase-only structuring. We demonstrate trapping of 3.5–10.0 μm silica spheres, achieving a stiffness up to 27.5 ± 4.1 times higher than was possible using Gaussian traps as well as a two-orders-of-magnitude higher measured signal-to-noise ratio. These results are highly relevant to many applications, including cellular manipulation, fluid dynamics, micro-robotics and tests of fundamental physics.
Keyword Optics
Physics, Applied
Optics
Physics
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID DP140100734
FA2386-14-1-4046
FF140100650
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2016 Collection
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 22 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 24 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Tue, 08 Sep 2015, 10:59:37 EST by System User on behalf of Scholarly Communication and Digitisation Service