Generation of Relativistic Structured Spin-Polarized Lepton Beams
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.
Keywords
Cite
@article{arxiv.2504.11113,
title = {Generation of Relativistic Structured Spin-Polarized Lepton Beams},
author = {Zhong-Peng Li and Yu Wang and Yousef I. Salamin and Mamutjan Ababekri and Feng Wan and Qian Zhao and Kun Xue and Ye Tian and Jian-Xing Li},
journal= {arXiv preprint arXiv:2504.11113},
year = {2025}
}