11 September 2006 Holographic optical tweezers: manipulations at an air-liquid interface
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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.
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Alexander Jesacher, Alexander Jesacher, Severin Fürhapter, Severin Fürhapter, Christian Maurer, Christian Maurer, Stefan Bernet, Stefan Bernet, Monika Ritsch-Marte, Monika Ritsch-Marte, } "Holographic optical tweezers: manipulations at an air-liquid interface", Proc. SPIE 6326, Optical Trapping and Optical Micromanipulation III, 63261U (11 September 2006); doi: 10.1117/12.678287; https://doi.org/10.1117/12.678287
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