Focusing properties of power-exponent-phase vortex beam focused by high numerical-aperture objective

Li Haoran; Fan Chengjin; Dang Jinchao; Chen Ziyang; Pu Jixiong

doi:10.11884/HPLPB201830.170259

Volume 30 Issue 1

Jan. 2018

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Li Haoran, Fan Chengjin, Dang Jinchao, et al. Focusing properties of power-exponent-phase vortex beam focused by high numerical-aperture objective[J]. High Power Laser and Particle Beams, 2018, 30: 011002. doi: 10.11884/HPLPB201830.170259

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Li Haoran, Fan Chengjin, Dang Jinchao, et al. Focusing properties of power-exponent-phase vortex beam focused by high numerical-aperture objective[J]. High Power Laser and Particle Beams, 2018, 30: 011002. doi: 10.11884/HPLPB201830.170259

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Focusing properties of power-exponent-phase vortex beam focused by high numerical-aperture objective

doi: 10.11884/HPLPB201830.170259

Fujian Provincial Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China

Received Date: 2017-06-22
Rev Recd Date: 2017-09-13
Publish Date: 2018-01-15

Abstract

Abstract

Based on vectorial Debye theory, the focusing properties of linearly polarized power-exponent-phase vortex beam focused by a high numerical aperture objective is studied. The influence of the topological charge and power index on the focal intensity and the phase of x-component is investigated in detail. The result shows that different types of focal intensity distribution, such as dark-core shape focal beam with beam size of 2 wavelength, can be generated by controlling the topological charge and power index. In particular, it is found that the phase singularity of power-exponent phase vortex beam has a deviation from the geometrical focus. The potential applications of this study may include particle manipulation.
- vortex beam,
- high numerical aperture,
- tight focusing,
- phase singularity

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References(13)

References

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