title: Position clamping of optically trapped microscopic non-spherical probes.
abstract: We investigate the degree of control that can be exercised over an optically trapped microscopic non-spherical force probe. By position clamping translational and rotational modes in different ways, we are able to dramatically improve the position resolution of our probe with no reduction in sensitivity. We also demonstrate control over rotational-translational coupling, and exhibit a mechanism whereby the average centre of rotation of the probe can be displaced away from its centre.
authors: H. H. Wills Physics Laboratories, University of Bristol, Bristol, England, United Kingdom.
authors: D B
authors: DB
authors: Phillips
authors: S H
authors: SH
authors: Simpson
authors: J A
authors: JA
authors: Grieve
authors: G M
authors: GM
authors: Gibson
authors: R
authors: R
authors: Bowman
authors: M J
authors: MJ
authors: Padgett
authors: M J
authors: MJ
authors: Miles
authors: D M
authors: DM
authors: Carberry
mesh_terms: D000465:Algorithms; D004867:Equipment Design; D007834:Lasers; D008846:Micromanipulation / Q000379:methods; D015233:Models, Statistical; D052898:Optical Tweezers; D055095:Optics and Photonics; D013314:Stress, Mechanical; D014741:Video Recording