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Opt Express. 2009 Jun 8;17(12):9981-8.

Optical trapping and manipulation of metallic micro/nanoparticles via photorefractive crystals.

Author information

  • 1MOE Key Laboratory of Weak-Light Nonlinear Photonics, TEDA Applied Physics School and Institute of Physics, Nankai University, Tianjin, China.

Abstract

A simple method to trap and manipulate metallic micro/nano-particles on the surface of photorefractive crystals is proposed. After inducing inhomogeneous charge density and space-charge fields in photorefractive crystals by non-uniform illumination, both uncharged and charged metallic particles can be trapped on the illuminated surface due to dielectrophoretic force and electrophoretic force, respectively. A transition from dielectrophoresis to electrophoresis is observed when manipulating nano-silver particles with high surface space-charge field. Our results show that this method is simple and effective to form surface microstructures of metallic particles.

PMID:
19506648
[PubMed - indexed for MEDLINE]
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