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《Photonics Research》 2019年09期
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Synthetic optical vortex beams from the analogous trajectory change of an artificial satellite

HAIPING WANG  LIQIN TANG  JINA MA  X1IUYAN ZHENG  DAOHONG SONG  YI HU  YIGANG LI  ZHIGANG CHEN  
【摘要】:We propose a method to generate specially shaped high-order singular beams of pre-designed intensity distributions. Such a method does not a priori assume a phase formula, but rather relies on the "cake-cutting and assembly" approach to achieve the azimuthal phase gradient for beam shaping, inspired by the orbital motion trajectory change of an artificial satellite. Based on our method, several typical vortex beams with desired intensity patterns are experimentally generated. As an example, we realize optical trapping and transportation of microorganisms with a triangle-shaped vortex beam, demonstrating the applicability of such unconventional vortex beams in optical trapping and manipulation.

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