Generation of Terahertz Superimposed Perfect Vortex Beams

A terahertz (THz) superimposed perfect vortex (SPV) beam is generated by using a designed superimposed optimal phase element (SOPE) at 0.3 THz. As the superimposed topological charge changes, the ring radius of THz SPV beams remains almost constant in the experiment, whose relative error is only 0.9...

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Bibliographic Details
Published in:IEEE photonics journal 2021-08, Vol.13 (4), p.1-5
Main Authors: Yang, Yongqiang, Wang, Tianyi, Wang, Kejia, Yang, Zhengang, Liu, Jinsong
Format: Article
Language:English
Subjects:
Communication systems
Communications systems
Current carriers
diffractive elements
Electron beams
Lenses
Optical fiber communication
Optical fiber devices
Optical fiber theory
perfect vortex beam
Rings (mathematics)
Terahertz
Three-dimensional displays
Three-dimensional printing
Topology
vortex beam
Vortices
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Summary:A terahertz (THz) superimposed perfect vortex (SPV) beam is generated by using a designed superimposed optimal phase element (SOPE) at 0.3 THz. As the superimposed topological charge changes, the ring radius of THz SPV beams remains almost constant in the experiment, whose relative error is only 0.96%. The perfect vortex property is confirmed. The intensity profile of THz SPV beams is a ring with equally spaced breakpoints. The superimposed topological charge carried can be judged directly by identifying the number of breakpoints. The ring radius is linearly related to the radial wave vector, which can be adjusted. Such THz SPV beams have promising applications for THz fiber communication systems based on vortex beams.
ISSN:1943-0655
1943-0655
1943-0647
DOI:10.1109/JPHOT.2021.3099843