title: Optical trapping of gold nanoparticles by cylindrical vector beam.
abstract: Optical trapping of gold nanoparticles is experimentally demonstrated using radially and azimuthally polarized beams. The transverse optical trapping stiffness of gold nanoparticles is measured. The radially polarized beam exhibits a higher trapping efficiency than the azimuthally polarized beam and the Gaussian beam. The transverse stiffness of particles with different diameters is measured experimentally and calculated via the discrete-dipole approximation method, and good agreement between theory and experiment is found.
authors.affiliation: Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Huang
authors.forename: Honglian
authors.initials: H
authors.lastname: Guo
authors.forename: Jiafang
authors.initials: J
authors.lastname: Li
authors.forename: Lin
authors.initials: L
authors.lastname: Ling
authors.forename: Baohua
authors.initials: B
authors.lastname: Feng
authors.forename: Zhi-Yuan
authors.initials: ZY
authors.lastname: Li