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您的检索式：作者名="YUECHAI LIN"
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| 1 | Vortex Smith-Purcell radiation generation with holographic grating显示文摘Smith–Purcell radiation(SPR)is the electromagnetic wave generated by free electrons passing above a diffraction grating,and it has played an important role in free-electron light sources and particle accelerators.Orbital angular momentum(OAM)is a new degree of freedom that can significantly promote the capacity of information carried by an electro-magnetic beam.In this paper,we propose an integrable method for generating vortex Smith–Purcell radiation(VSPR),namely,SPR carrying OAM,by having free-electron bunches pass on planar holographic gratings.VSPRs generated by different electron energies,with different topological charges of the OAM,radiation angles,and frequencies are demonstrated numerically.It is also found that,for high-order radiation,the topological charge of the OAM wave will be multiplied by the radiation order.This work introduces a new way to generate SPR with OAM and provides a method to achieve an integratable and tunable free-electron OAM wave source at different frequency regions. | MENGXUAN WANG FANG LIU YUECHAI LIN KAIYU CUI XUE FENG WEI ZHANG YIDONG HUANG | 2020 | Photonics Research2020，8，8： | 2 |
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