Many experiments and force calculations1,2 relating to optical trapping for transparent particles have been carried out. Recently, optical trappings of micrometer-sized iron particles with a scanning laser beam3 and of nanometer-sized gold particles4 have been reported. We have also demonstrated optical trapping of micrometer-sized metal particles with a fixed laser beam.5 However, metal particles have a complex refractive index, and force calculations for these absorptive particles have, to our knowledge, not yet been reported.
© 1995 Optical Society of AmericaPDF Article
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