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ORIGINAL RESEARCH article

Front. Phys.
Sec. Optics and Photonics
Volume 13 - 2025 | doi: 10.3389/fphy.2025.1500137
This article is part of the Research Topic Advanced Methods in Exploring Light-Matter Interactions and Their Applications View all 6 articles

Relativistic nonlinear Thomson scattering of excited electron in ultratightly focused circularly polarized laser pulses with different beam waist radius

Provisionally accepted
Qianmin Zheng Qianmin Zheng 1*Jiachen Li Jiachen Li 1Zi Wang Zi Wang 2Youwei Tian Youwei Tian 3
  • 1 Bell Honors School, Nanjing University of Posts and Telecommunications, Nanjing, Liaoning Province, China
  • 2 School of Communications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing, China
  • 3 College of Science, Nanjing University of Posts and Telecommunications, Nanjing, China

The final, formatted version of the article will be published soon.

    Based on Thomson scattering classical theory and single-electron model, we explore the influence of variations in the laser beam waist radius on the interaction between an ultra-tightly focused(UTF) laser and off-axis electron. In practical experiments, off-axis collisions predominate, and our study specifically addresses this scenario. Under UTF conditions (𝑏 0 =2𝜆 0 ), electron experience significant asymmetric forces, leading to deviations in axial trajectories, acceleration, and oscillations in energy. Simultaneously, observable asymmetries emerge in the electron's radiated power and spectrum, gradually diminishing as the beam waist radius increases. These findings are pivotal for generating ultrashort pulses, particularly in ultrashort optics, and hold significance for applications leveraging nonlinear inverse Thomson scattering radiation.

    Keywords: Beam waist, circularly polarized laser, laser physics, ultra-tightly focused laser, offaxis electron, Relativistic nonlinear Thomson scattering

    Received: 22 Sep 2024; Accepted: 16 Jan 2025.

    Copyright: © 2025 Zheng, Li, Wang and Tian. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Qianmin Zheng, Bell Honors School, Nanjing University of Posts and Telecommunications, Nanjing, Liaoning Province, China

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