Orbital angular momentum generator based on super Smith-Purcell radiation

Zi-Wen Zhang, Chao-Hai Du, Juan-Feng Zhu, Fan-Hong Li, Pu-Kun Liu, Adrian W. Cross, Liang Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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.

Original languageEnglish
Title of host publication2020 13th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies, UCMMT 2020
Place of PublicationNew York
Number of pages3
ISBN (Electronic)9781728190648
DOIs
Publication statusPublished - 30 Dec 2020
Event13th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies, UCMMT 2020 - Virtual, Tianjin, China
Duration: 29 Aug 20201 Sep 2020

Publication series

Name2020 13th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies, UCMMT 2020
PublisherIEEE
ISSN (Print)2639-4545
ISSN (Electronic)2639-4537

Conference

Conference13th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies, UCMMT 2020
Country/TerritoryChina
CityVirtual, Tianjin
Period29/08/201/09/20

Keywords

  • electron beams
  • gratings
  • orbits
  • dispersion
  • optical fiber communication
  • harmonic analysis
  • photonics

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