Optically induced rotation of a trapped micro-object about an axis perpendicular to the laser beam axis
- 8 June 1998
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 72 (23) , 2951-2953
- https://doi.org/10.1063/1.121504
Abstract
A strongly focused Nd:YAG laser beam has been used experimentally to achieve optical trapping and simultaneous rotation of a micro-object about an axis perpendicular to the trapping laser beam axis. The micro-object (12 μm in diameter), which has shape anisotropy in its interior, can be produced by oxygen reactive ion etching of a fluorinated polyimide film (refractive index n=1.53). This optically induced rotation of the micro-object in ethanol (n=1.36) is accomplished by utilizing the net radiation pressure force arising from the momentum change of light scattered at the micro-object’s inner walls.Keywords
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