Theoretical investigation of relativistic vortex high-order harmonics generation and manipulation

Wang Jian; Wu Jiaxin; Xie Duan; Cai Dafeng; Li Dongxia

doi:10.11884/HPLPB202335.220256

Volume 35 Issue 5

Apr. 2023

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Wang Jian, Wu Jiaxin, Xie Duan, et al. Theoretical investigation of relativistic vortex high-order harmonics generation and manipulation[J]. High Power Laser and Particle Beams, 2023, 35: 051003. doi: 10.11884/HPLPB202335.220256

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Wang Jian, Wu Jiaxin, Xie Duan, et al. Theoretical investigation of relativistic vortex high-order harmonics generation and manipulation[J]. High Power Laser and Particle Beams, 2023, 35: 051003. doi: 10.11884/HPLPB202335.220256

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Theoretical investigation of relativistic vortex high-order harmonics generation and manipulation

doi: 10.11884/HPLPB202335.220256

1.
College of Physics and Electronic Information Engineering, Neijiang Normal College, Neijiang 641000, China
2.
School of Electronic Information and Electrical Engineering, Changsha University, Changsha 410003, China
3.
School of Mechanical Engineering, Guilin University of Electronic Technology, Guilin 541004, China

Received Date: 2022-08-21
Accepted Date: 2023-01-19
Rev Recd Date: 2023-01-19

Available Online: 2023-02-07

Publish Date: 2023-04-07

Abstract

Abstract

Vortex beams with ultra-high brilliance can greatly enrich the light and matter interaction process and even shed light on the unexpected information in relativistic nonlinear optics. Thus, we propose a scheme for relativistic intense vortex harmonic radiation by use of bi-circular Laguerre-Gaussian lasers irradiating relativistic plasmas. According to the law of conservation of photon energy and angular momentum during the generation of higher-order harmonics, the emitted harmonics own controllable spin and orbital angular momentum simultaneously, as the three-dimensional particle-in-cell simulation results shown. Based on this discussion, the methods of adjusting harmonic order, polarization state (spin angular momentum) and topological charge number (orbital angular momentum) are proposed. It is found that if frequency ratio and circular polarization state of the bi-chromatic Laguerre-Gaussian laser are changed, such as with the same right-handed or left-handed circular polarization. The harmonic characteristics, including the harmonic order, the polarization state and the vortex order are flexibly controlled. Therefore, this work provides an efficient and practical approach to produce bright, spectral tunable harmonic radiation with designable spin and orbital angular momentum, which may own the application prospect going from optical communications, bio-photonics, optical micromanipulations to ion accelerations.
- vortex beams,
- Laguerre-Gaussian lasers,
- spin angular momentum,
- orbital angular momentum,
- harmonic radiation

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References(23)

References

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