Phillips, D., 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 (Europhysics Letters), 99(5), p. 58004. (doi: 10.1209/0295-5075/99/58004)
Full text not currently available from Enlighten.
Publisher's URL: http://dx.doi.org/10.1209/0295-5075/99/58004
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.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Gibson, Dr Graham and Bowman, Dr Richard and Phillips, Dr David and Padgett, Professor Miles |
| Authors: | Phillips, D., 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. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | EPL (Europhysics Letters) |
| ISSN: | 0295-5075 |
| ISSN (Online): | 1286-4854 |
| Published Online: | 12 September 2012 |
University Staff: Request a correction | Enlighten Editors: Update this record
Altmetric
Altmetric