Optical trapping of gold nanoparticles by cylindrical vector beam |
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Authors: | Huang Lu Guo Honglian Li Jiafang Ling Lin Feng Baohua Li Zhi-Yuan |
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Affiliation: | Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China. |
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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. |
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