Back to Search
Start Over
Two- and three-beam interferometric optical traps
- Publication Year :
- 2005
-
Abstract
- We present an experimental demonstration of multiple optical tweezers based on interference of two co-propagating beams that intersect at a given angle and form interference fringes (asymmetric optical traps) at the focal plane of a focusing lens. Since this arrangement provides only two-dimensional trapping when the objects are pushed against the coverglass, we added the third counter-propagating beam. This beam did not interfere with the previous two but compensated their radiation pressure. Therefore, stable three-dimensional confinement into multiple fringes is achieved. We quantified experimentally the maximal optical forces exerted on 1 lm polystyrene bead in both configurations and compared them with theoretical predictions. Reasonable good coincidence was found especially for two-dimensional trapping.
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.od......3730..34d6347b4e5d2cc69b762b674dd53170