Generalized high-order twisted partially coherent beams and their propagation characteristics

doi:10.1007/s11467-022-1196-8

Frontiers of Physics

2022, Vol. 17

Issue (5): 52506 https://doi.org/10.1007/s11467-022-1196-8

本期目录

Generalized high-order twisted partially coherent beams and their propagation characteristics

Hai-Yun Wang¹, Zhao-Hui Yang¹, Kun Liu¹, Ya-Hong Chen¹, Lin Liu¹(

), Fei Wang¹(

), Yang-Jian Cai^1,²(

)

¹. School of Physical Science and Technology & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China
². Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Devices, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China

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Abstract：

Twist phase is a nontrivial statistical phase that only exists in partially coherent fields, which makes the beam carry orbital angular momentum (OAM). In this paper, we introduce a new kind of partially coherent beams carrying high-order twist phase, named generalized high-order twisted partially coherent beams (GHTPCBs). The propagation dynamics such as the spectral density and OAM flux density propagating in free space are investigated numerically with the help of mode superposition and fast Fourier transform (FFT) algorithm. Our results show that the GHTPCBs are capable of self-focusing, and the beam spot during propagation exhibits teardrop-like or the diamond-like shape in some certain cases. Moreover, the influences of the twist order and the twist factor on the OAM flux density during propagation are also illustrated in detail. Finally, we experimentally synthesize the GHTPCBs with controllable twist phase by means of pseudo-mode superposition and measure their spectral density during propagation. The experimental results agree well with the theoretical predictions. Our studies may find applications in nonlinear optics and particle trapping.

Key words： light manipulation statistical optics twist phase coherence structure orbital angular momentum

收稿日期: 2022-04-12 出版日期: 2022-09-06

Corresponding Author(s): Lin Liu,Fei Wang,Yang-Jian Cai

引用本文:

. [J]. Frontiers of Physics, 2022, 17(5): 52506.
Hai-Yun Wang, Zhao-Hui Yang, Kun Liu, Ya-Hong Chen, Lin Liu, Fei Wang, Yang-Jian Cai. Generalized high-order twisted partially coherent beams and their propagation characteristics. Front. Phys. , 2022, 17(5): 52506.

链接本文:

https://academic.hep.com.cn/fop/CN/10.1007/s11467-022-1196-8
https://academic.hep.com.cn/fop/CN/Y2022/V17/I5/52506

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