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.

  • Item type:Book Section
    ID code:76312
    Dates:
    Date
    Event
    30 December 2020
    Published
    1 September 2020
    Published Online
    20 July 2020
    Accepted
    Notes:© 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:08 Apr 2024 14:07
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/76312
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