Photophoretic trapping of multiple particles in tapered-ring optical field | Zendy

Fengrui Liu | Zendy; Zhigang Zhang | Zendy; Yufeng Wei | Zendy; Qingchuan Zhang | Zendy; Teng Cheng | Zendy; Xiaoping Wu | Zendy

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Photophoretic trapping of multiple particles in tapered-ring optical field

Author(s) -

Fengrui Liu,

Zhigang Zhang,

Yufeng Wei,

Qingchuan Zhang,

Teng Cheng,

Xiaoping Wu

Publication year - 2014

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.22.023716

Subject(s) - optics , trapping , optical tweezers , materials science , aperture (computer memory) , particle (ecology) , diffraction , mie scattering , spherical aberration , laser , physics , light scattering , lens (geology) , scattering , ecology , oceanography , acoustics , biology , geology

We demonstrate the photophoretic trapping of more than several hundreds of absorbing particles by tapered-ring optical traps diffracted from a circular aperture. The experiments with different laser powers show the influence of air flow acting on particles. Three kinds of particles with different densities (about 1~7 g/cm(3)) and different shapes (spherical, non-spherical) can be trapped. The non-spherical particles (toner particles) disperse in optical field, while the spherical particles (ink droplets and iron particles) arrange as a straight line. More importantly, in the experiments of two counter-propagating tapered-ring beams, the agglomeration of particles is achieved and can help research the dynamics of aerosols.

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