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Rapid readout of terahertz orbital angular momentum beams using atom-based imaging

Downes, Lucy A.; Whiting, Daniel J.; Adams, C. Stuart; Weatherill, Kevin J.

Rapid readout of terahertz orbital angular momentum beams using atom-based imaging Thumbnail


Authors

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Lucy Downes lucy.downes@durham.ac.uk
Post Doctoral Research Associate

Daniel J. Whiting



Abstract

We demonstrate the rapid readout of terahertz orbital angular momentum (OAM) beams using an atomic-vapor-based imaging technique. OAM modes with both azimuthal and radial indices are created using phase-only transmission plates. The beams undergo terahertz-to-optical conversion in an atomic vapor, before being imaged in the far field using an optical CCD camera. In addition to the spatial intensity profile, we also observe the self-interferogram of the beams by imaging through a tilted lens, allowing the sign and magnitude of the azimuthal index to be read out directly. Using this technique, we can reliably read out the OAM mode of low-intensity beams with high fidelity in 10 ms. Such a demonstration is expected to have far-reaching consequences for proposed applications of terahertz OAM beams in communications and microscopy.

Citation

Downes, L. A., Whiting, D. J., Adams, C. S., & Weatherill, K. J. (2022). Rapid readout of terahertz orbital angular momentum beams using atom-based imaging. Optics Letters, 47(22), 6001-6004. https://doi.org/10.1364/ol.476945

Journal Article Type Article
Acceptance Date Oct 24, 2022
Online Publication Date Nov 11, 2022
Publication Date Nov 15, 2022
Deposit Date Nov 15, 2022
Publicly Available Date Mar 28, 2024
Journal Optics Letters
Print ISSN 0146-9592
Electronic ISSN 1539-4794
Publisher Optica
Peer Reviewed Peer Reviewed
Volume 47
Issue 22
Pages 6001-6004
DOI https://doi.org/10.1364/ol.476945
Public URL https://durham-repository.worktribe.com/output/1186549
Related Public URLs https://pubmed.ncbi.nlm.nih.gov/37219157/

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this
work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.





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