Ultra high frequency gravitational waves from Laguerre–Gaussian beam: a possible source in lab Hao Zhong, Yuhong Fang, Jianhao Zhan, Rushi Yang and Yongsheng Huang Eur. Phys. J. C, 85 4 (2025) 436 Published online: 18 April 2025 DOI: 10.1140/epjc/s10052-025-14158-1