A spiral-like curve with an adjustable opening generated by a modified helico-conical beam

A spiral-like curve with an adjustable opening generated by a modified helico-conical beam
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由改进的螺旋锥形梁产生的具有可调节开口的螺旋状曲线

DOI:
10.1016/j.optcom.2019.124824
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发表时间:
2020-03
影响因子:
2.4
通讯作者:
Cheng Shubo
Cheng Shubo
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Xia Tian;Tao Shaohua;Cheng Shubo

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提出了一种改进的螺旋锥光束(MHCB),用于在透镜焦平面处产生具有可调开度的螺旋形曲线。螺旋形曲线的开度可以很好地调节,随着分数的增加,开度先快速增大后缓慢增大。对于MHCB,在焦平面的开口周围也没有杂散光。此外,沿光轴方向接近透镜焦平面的MHCB的强度分布图发生了旋转。此外,实验还证明了带开口的螺旋状光束可以用于输运粒子。说明了MHCB的生成方法。此外,我们还通过数值和实验证明了MHCB可以产生螺旋状的强度分布。该光束可以诱导粒子的输运,并将多个粒子聚集在螺旋形曲线的中心,并将粒子分类到不同的位置。
A modified helico-conical beam (MHCB) is proposed to generate a spiral-like curve with an adjustable opening at the focal plane of a lens. Moreover, the opening of a spiral-like curve can be adjustable finely, which firstly increases quickly and then increases slowly with the increasement of the fractionn. For the MHCB, there is not also stray light around the opening at the focal plane. In addition, the intensity profile for the MHCB approaching the focal plane of the lens along the optic axis rotates. Furthermore, it is also proved in the experiments that the spiral-like beam with the opening can be used to transport particles. The generating method of the MHCB is illustrated. In addition, we also prove numerically and experimentally that the MHCB can produce a spiral-like intensity distribution. The proposed beam can be applied to induce transportation of particles, and collect multiple particles in the center of the spiral-like curve, and sort the particles into different positions.
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