Generation of Intense Vortex Gamma Rays via Spin-to-Orbital Conversion of Angular Momentum in Relativistic Laser-Plasma Interactions

被引：22
作者：
Wang, J. [1 ,2 ]
Li, X. B. [1 ,2 ]
Gan, L. F. [1 ,2 ]
Xie, Y. [1 ,2 ]
Zhong, C. L. [1 ,2 ]
Zhou, C. T. [3 ]
Zhu, S. P. [4 ]
He, X. T. [1 ,2 ,4 ]
Qiao, B. [1 ,2 ]
机构：
[1] Peking Univ, Sch Phys, Ctr Appl Phys & Technol, HEDPS, Beijing 100871, Peoples R China
[2] Peking Univ, Sch Phys, SKLNPT, Beijing 100871, Peoples R China
[3] Shenzhen Technol Univ, Ctr Adv Mat Diagnost Technol, Shenzhen 518118, Peoples R China
[4] Inst Appl Phys & Computat Math, Beijing 100094, Peoples R China
来源：
PHYSICAL REVIEW APPLIED | 2020年 / 14卷 / 01期
基金：
中国国家自然科学基金; 国家重点研发计划; 国家杰出青年科学基金;
关键词：
OPTICAL VORTEX; COHERENT; LIGHT; BEAM;
D O I：
10.1103/PhysRevApplied.14.014094
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Vortex gamma-ray beams with large orbital angular momentum (OAM) have significant potential applications in material science, nuclear detection, and astrophysics. An all-optical scheme for production of intense vortex gamma-ray beams using relativistic laser-plasma interactions is proposed, where the OAM of gamma-photons is converted from the spin angular momentum of circularly polarized (CP) lasers. The spin-to-orbital angular momentum conversion is achieved by two processes: resonant acceleration of electrons in CP laser-plasma interactions and nonlinear Compton scattering (NCS) of another linearly polarized laser from the former. Three-dimensional particle-in-cell simulations show that vortex gamma-ray beams with a large and controllable OAM of 2.5 x 10(18)(h) over bar and energy up to hundreds of MeV can be obtained by using two lasers at intensities of approximately 10(22)W/cm(2), which is much more practical and more efficient than previously proposed NCS of a Laguerre-Gaussian beam.
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页数：8
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