Vol. 43, Issue 4, pp. 719-730 (2013)

Vol. 43 Issue 4 pp. 719-730

Optical gradient force of cosh-Gaussian with sine-azimuthal and half-space phase modulation

Rui Fu, Xiumin Gao, Haibin Shen, Qing Xin, Xinmiao Lu, Lingwei Guo

Keywords

optical gradient force, cosh-Gaussian beams, wavefront modulation

Abstract

The optical gradient force distributions in focal plane of cosh-Gaussian beams with sine-azimuthal variation wavefront and half space phase modulation were investigated. Results show that optical gradient force distributions can be affected considerably by the phase retardation of half-space phase modulation, of a phase parameter that indicates the phase change frequency on an increasing azimuthal angle, and beam parameters in cosh terms of the incident beams. Many gradient force patterns occur, including cross-shape, multiple optical trap arrays, multiple-trap wheel, and many kinds of gradient force lines and curves. Symmetry of the whole gradient force pattern can also be altered remarkably. Above results may find wide applications in optical trapping systems.

Vol. 43
Issue 4
pp. 719-730

3.75 MB

Corresponding address

Optica Applicata
Wrocław University of Science and Technology
Faculty of Fundamental Problems of Technology
Wybrzeże Wyspiańskiego 27
50-370 Wrocław, Poland

Publisher

Wrocław University of Science and Technology
Faculty of Fundamental Problems of Technology
Wybrzeże Wyspiańskiego 27
50-370 Wrocław, Poland

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