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Proceedings Paper

Holographic optical tweezers: manipulations at an air-liquid interface
Author(s): Alexander Jesacher; Severin Fürhapter; Christian Maurer; Stefan Bernet; Monika Ritsch-Marte
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Paper Abstract

By performing experiments at an air-water interface, we operate Holographic Optical Tweezers in a qualitatively new environment. In this regime, trapping and moving of micro particles may allow access to parameters like local viscosity and surface tension. Polystyrene micro beads are naturally stabilized in the interface due to a minimum in surface energy. For this reason, they can also be manipulated by light patterns with small axial field gradients, without causing the particles to escape due to scattering forces. In this manner, the interface provides a true two-dimensional "working environment", where particles can be manipulated with high effciency. For example, we demonstrate different optical "micro tools", which utilize scattering and gradient forces to enable controlled transport of matter within the surface.

Paper Details

Date Published: 11 September 2006
PDF: 5 pages
Proc. SPIE 6326, Optical Trapping and Optical Micromanipulation III, 63261U (11 September 2006); doi: 10.1117/12.678287
Show Author Affiliations
Alexander Jesacher, Innsbruck Medical Univ. (Austria)
Severin Fürhapter, Innsbruck Medical Univ. (Austria)
Christian Maurer, Innsbruck Medical Univ. (Austria)
Stefan Bernet, Innsbruck Medical Univ. (Austria)
Monika Ritsch-Marte, Innsbruck Medical Univ. (Austria)

Published in SPIE Proceedings Vol. 6326:
Optical Trapping and Optical Micromanipulation III
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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