AUTHOR=Zheng Qianmin , Li Jiachen , Wang Zi , Tian Youwei TITLE=Relativistic nonlinear Thomson scattering of excited electron in ultra-tightly focused circularly polarized laser pulses with different beam waist radius JOURNAL=Frontiers in Physics VOLUME=13 YEAR=2025 URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2025.1500137 DOI=10.3389/fphy.2025.1500137 ISSN=2296-424X