Vortex laser beam generation from laser interaction with azimuthal plasma phase slab at relativistic intensities

It is shown theoretically and by simulation that a Gaussian laser beam of relativistic intensity interacting with a uniform-thickness plasma slab of azimuthally varying density can acquire orbital angular momentum (OAM). During the interaction, the laser ponderomotive force and the charge-separation...

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Bibliographic Details
Published in:Physical review. E 2021-02, Vol.103 (2-1), p.023204-023204, Article 023204
Main Authors: Long, Tianyun, Zhou, Cangtao, Wu, Sizhong, Ju, Libao, Jiang, Ke, Bai, Ruixue, Huang, Taiwu, Zhang, Hua, Yu, Mingyang, Ruan, Shuangchen, He, Xiantu
Format: Article
Language:English
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Summary:It is shown theoretically and by simulation that a Gaussian laser beam of relativistic intensity interacting with a uniform-thickness plasma slab of azimuthally varying density can acquire orbital angular momentum (OAM). During the interaction, the laser ponderomotive force and the charge-separation force impose a torque on the plasma particles. The affected laser light and plasma ions gain oppositely directed axial OAM, but the plasma electrons remain almost OAM free. High OAM conversion efficiency is achieved due to the strong azimuthal electromagnetic energy flow during the laser phase modulation. The present scheme should provide useful reference for applications requiring relativistic-intense vortex light.
ISSN:2470-0045
2470-0053
DOI:10.1103/PhysRevE.103.023204