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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. © 2007 American Institute of Physics.
Farhad Rachidi-Haeri, Antonio Sunjerga, Thomas Chaumont
Elison de Nazareth Matioli, Alessandro Floriduz, Zheng Hao