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arXiv · 2504.11113

Generation of Relativistic Structured Spin-Polarized Lepton Beams

Zhong-Peng Li·Yu Wang·Yousef I. Salamin·Mamutjan Ababekri·Feng Wan·Qian Zhao·Kun Xue·Ye Tian·Jian-Xing Li
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Abstract

Relativistic structured spin-polarized (SSP) particle beams, characterized by polarization structures, are of critical importance in a wide range of applications, such as material properties investigation, imaging, and information storage. However, generation of relativistic SSP beams faces significant challenges. Here, we put forward a novel method for generating relativistic SSP lepton beams via employing a moderate-intensity terahertz (THz) wave. Building upon our foundational work on velocity-matched spin rotation in dielectric-lined waveguides [Phys. Rev. Lett. 134, 075001 (2025)], we present the first demonstration of spin-polarization mode matching - a novel mechanism that establishes a direct relation between waveguide modes and beam polarization states. This breakthrough enables precise spatial control over spin structures at relativistic energies, generating customizable spin-polarization configurations such as spider-like, azimuthal, and helical structures, etc. Such SSP beams have the potential to generate high-energy structured photon beams and open a new avenue for research on relativistic structured particle beams, especially in nuclear physics, high-energy physics, materials science and atomic physics.

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Zhong-Peng Li, Yu Wang, Yousef I. Salamin, Mamutjan Ababekri, Feng Wan, Qian Zhao, Kun Xue, Ye Tian, Jian-Xing Li. 2025-04-15. Generation of Relativistic Structured Spin-Polarized Lepton Beams. https://arxiv.org/abs/2504.11113

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