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Rapid readout of terahertz orbital angular momentum beams using atom-based imaging [dataset] Open Access

We demonstrate the rapid readout of terahertz (THz) orbital angular momentum (OAM) beams using an atomic-vapour 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 vapour, 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\,\si{\milli\second}. Such a demonstration is expected to have far-reaching consequences for proposed applications of terahertz OAM beams in communications and microscopy.

Descriptions

Resource type
Dataset
Contributors
Creator: Downes, Lucy 1
Contact person: Downes, Lucy 1
Data collector: Downes, Lucy 1
Contact person: Weatherill, Kevin 1
1 Durham University, UK
Funder
Engineering and Physical Sciences Research Council
European Commission
Research methods
Other description
Keyword
Terahertz
Imaging
Orbital angular momentum
Subject
Location
Language
Cited in
Identifier
ark:/32150/r19k41zd56p
doi:10.15128/r19k41zd56p
Rights
Creative Commons Attribution 4.0 International (CC BY)

Publisher
Durham University
Date Created

File Details

Depositor
L.A. Downes
Date Uploaded
Date Modified
22 August 2022, 11:08:42
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File format: zip (ZIP Format)
Mime type: application/zip
File size: 887934428
Last modified: 2022:08:22 11:37:39+01:00
Filename: Rapid_Readout_of_THz_OAM_Beams-r19k41zd56p-version1.zip
Original checksum: cc8d8b9abebd2da05fd7ac478ddc5288
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