Bimodal vortex Smith-Purcell radiation

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

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

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Abstract

A vortex Smith-Purcell radiation (VSPR) with twin operation points, namely bimodal VSPR, is proposed based on a depth-modulated triple-slots helical grating. Due to the Brillouin-zone folding phenomenon, the dispersion of the helical grating is folded twice in the momentum space. Thus, two spoof surface plasmon (SSP) modes carrying orbital angular momentum can be directly diffracted into the vortex beam. When a ring-shaped e beam flies over the surface of the helical grating, the two SSP modes can be effectively excited owing to the momentum matching. Accordingly, a bimodal vortex Smith-Purcell radiation is achieved when the operating frequencies are in the radiation region, which is validated by the probed intensities and field distributions over the grating. The proposed bimodal vortex Smith-Purcell radiation may facilitate the generation and applications of vortex beams in microwave and terahertz band.
Original languageEnglish
Title of host publication2022 15th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT)
Place of PublicationPiscatway, NJ
PublisherIEEE
Pages1-3
Number of pages3
ISBN (Electronic)9781665493109
ISBN (Print)9781665493116
DOIs
Publication statusPublished - 27 Oct 2022
Event2022 15th UK-Europe-China Workshop on Millimetre-Waves and Tetrahertz Technologies (UCMMT) - Tønsberg, Norway
Duration: 17 Oct 202219 Oct 2022

Publication series

Name2022 15th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT)
PublisherIEEE

Conference

Conference2022 15th UK-Europe-China Workshop on Millimetre-Waves and Tetrahertz Technologies (UCMMT)
Abbreviated titleUCMMT 2022
Country/TerritoryNorway
CityTønsberg
Period17/10/2219/10/22

Keywords

  • space vehicles
  • extraterrestrial phenomenon
  • simulation
  • terahertz materials
  • microwave theory and techniques
  • orbits
  • frequency estimation

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