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Generation of gamma-ray beam with orbital angular momentum in the QED regime
X. M. Zhang, B. F. Shen, Y. Shi, X. F. Wang, L. G. Zhang, W. P. Wang, J. C. Xu, L. Q. Yi, and Z. Z. Xu, Phys. Rev. Lett. 114, 173901 (2015).
J. P. Zou, C. Le Blanc, D. N. Papadopoulos, G. Chériaux, P. Georges, G. Mennerat, F. Druon, L. Lecherbourg, A. Pellegrina, P. Ramirez, F. Giambruno, A. Fréneaux, F. Leconte, D. Badarau, J. M. Boudenne, D. Fournet, T. Valloton, J. L. Paillard, J. L. Veray, M. Pina, P. Monot, J. P. Chambaret, P. Martin, F. Mathieu, P. Audebert, and F. Amiranoff, High Power Laser Sci. Eng. 3, e2 (2015).
T. D. Arber, K. Bennett, C. S. Brady, A. Lawrence-Douglas, M. G. Ramsay, N. J. Sircombe, P. Gillies, R. G. Evans, H. Schmitz, A. R. Bell, and C. P. Ridgers, Plasma Phys. Controlled Fusion 57, 113001 (2015).
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We propose a scheme to generate high-energy gamma-ray
photons with an orbital angular momentum (OAM) from laser-plasma interactions by irradiating a circularly polarized Laguerre–Gaussian laser on a thin plasma target. The spin angular momentum and OAM are first transferred to electrons from the driving laser, and then the OAM is transferred to the gamma-ray
photons from the electrons through quantum radiation. This scheme has been demonstrated by using three-dimensional quantum electrodynamics particle-in-cell simulations. The topological charge, chirality, and carrier-envelope phase of the short ultra-intense vortex laser can be revealed according to the energy distribution of gamma-ray emission.
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