Free-electron-driven orbital angular momentum emitter

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

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

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Abstract

A free-electron-driven orbital angular momentum (OAM) emitter is introduced in this paper. When the free electron passes over the cylindrical grating, the spoof surface plasmon (SSP) is stimulated in this system. With loading a helical wire which induces a gradient azimuthal phase distribution the system, the SSP mode will be converted into the spatial OAM radiation. The operating frequency of the OAM mode can be tuned by the electron beam energy of the surface plasmon. Compared with the Smith-Purcell radiation from the helical grating, the field intensity is enhanced by about 50 times. This method provides an efficient way to generate the OAM mode, and may find applications in a communication system.

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
CountryChina
CityVirtual, Tianjin
Period29/08/201/09/20

Keywords

  • free-electron-driven orbital angular momentum emitter (OAM)
  • spoof surface plasmon (SSP)

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