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Published June 11, 2007 | public
Journal Article Open

Trapping of dielectric particles with light-induced space-charge fields


Light-induced space-charge fields in lithium niobate crystals are used to trap and manipulate dielectric particles on the surface of such crystals. Without any external voltage source, strong field gradients are present in the proximity of the crystal surface. These are used to trap particles with diameters in the range between 100 nm and some tens of micrometers.

Additional Information

©2007 American Institute of Physics (Received 13 April 2007; accepted 18 May 2007; published online 12 June 2007) Financial support of the DAAD, the Deutsche Telekom AG, the Deutsche Forschungsgemeinschaft, and the DARPA Center for Optofluidic Integration is gratefully acknowledged. The authors thank Dirk Apitz for helpful and valuable discussions.


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