Share Email Print
cover

Proceedings Paper

Rotation of microscopic discs by the angular momentum of light
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

While the behavior of spherical particles confined in light beams is well-studied, the dynamics of confined nonspherical particles may be qualitatively different, but remain largely unexplored. We studied the rotation of microscopic dielectric discs induced by the incident angular momentum of an elliptically polarized Laguerre- Gaussian beam. These flat particles are confined in three dimensions by the beam and are oriented naturally with its long axis along the direction of the propagation of the beam. Due to the rotationally asymmetric shape of the particles, we were able to induce a constant rotation of the particles and control it by changing the vorticity and ellipticity of the beam. We also showed a strong dependence on the induced rotation respect to size of the particles. These results provide a new approach to generate or study flows in the microscopic realm as an alternative to the former techniques based on birefringent, absorbent or chiral particles.

Paper Details

Date Published: 10 October 2012
PDF: 9 pages
Proc. SPIE 8458, Optical Trapping and Optical Micromanipulation IX, 84582U (10 October 2012); doi: 10.1117/12.930029
Show Author Affiliations
Alejandro V. Arzola, Institute of Scientific Instruments of the ASCR, v.v.i. (Czech Republic)
Martin Šiler, Institute of Scientific Instruments of the ASCR, v.v.i. (Czech Republic)
Oto Brzobohatý, Institute of Scientific Instruments of the ASCR, v.v.i. (Czech Republic)
Petr Jákl, Institute of Scientific Instruments of the ASCR, v.v.i. (Czech Republic)
Pavel Zemánek, Institute of Scientific Instruments of the ASCR, v.v.i. (Czech Republic)


Published in SPIE Proceedings Vol. 8458:
Optical Trapping and Optical Micromanipulation IX
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

© SPIE. Terms of Use
Back to Top