Optical application and measurement of torque on microparticles of isotropic nonabsorbing material
arXiv:physics/0309122 · doi:10.1103/PhysRevA.68.033802
Abstract
We show how it is possible to controllably rotate or align microscopic particles of isotropic nonabsorbing material in a TEM00 Gaussian beam trap, with simultaneous measurement of the applied torque using purely optical means. This is a simple and general method of rotation, requiring only that the particle is elongated along one direction. Thus, this method can be used to rotate or align a wide range of naturally occurring particles. The ability to measure the applied torque enables the use of this method as a quantitative tool--the rotational equivalent of optical tweezers based force measurement. As well as being of particular value for the rotation of biological specimens, this method is also suitable for the development of optically-driven micromachines.
8 pages, 6 figures
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Cited by in corpus (10)
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- Measurement of the total optical angular momentum transfer in optical tweezers
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- Negative optical torque on a microsphere in optical tweezers
- Comment on "Geometric absorption of electromagnetic angular momentum", C. Konz, G. Benford
- Optical measurement of torque exerted on an elongated object by a non-circular laser beam
- Opto-mechanical probes of resonances in amplifying microresonators
- Achiral nanostructures: perturbative harmonic generation and dichroism under vortex and vector beams illumination
- Lamination And Microstructuring Technology for a Bio-Cell Multiwell array
- Symmetry and the generation and measurement of optical torque