Orbital angular momentum generator based on super Smith-Purcell radiation
Zhang, Zi-Wen and Du, Chao-Hai and Zhu, Juan-Feng and Li, Fan-Hong and Liu, Pu-Kun and Cross, Adrian W. and Zhang, Liang; (2020) Orbital angular momentum generator based on super Smith-Purcell radiation. In: 2020 13th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies, UCMMT 2020. 2020 13th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies, UCMMT 2020 . Institute of Electrical and Electronics Engineers Inc., CHN. ISBN 9781728190648 (https://doi.org/10.1109/UCMMT49983.2020.9296121)
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Abstract
An orbital angular momentum (OAM) generator based on free-electron-driven super Smith-Purcell radiation (super-SPR) is proposed in this paper. The super-SPR carrying the OAM mode can be generated at a specific angle through interaction between the periodically bunched electron beam and a helical grating. The working frequency and topological charge of the OAM mode is related to the dispersion relation and the operating voltage of the free electron beam. The OAM mode of the topological charge of 1 can be achieved at 320GHz at the second harmonic. And the field intensity is significantly enhanced compared with the incoherent Smith-Purcell radiation, which finds potential applications in the OAM communications.
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Item type: Book Section ID code: 76312 Dates: DateEvent30 December 2020Published1 September 2020Published Online20 July 2020AcceptedNotes: © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Subjects: Science > Physics Department: Faculty of Science > Physics Depositing user: Pure Administrator Date deposited: 04 May 2021 15:21 Last modified: 10 Aug 2024 00:38 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/76312