Integrated vortex beam emitter in the THz frequency range: design and simulation
Integrated vortex beam emitter in the THz frequency range: design and simulation
Compact vortex beam emitters have emerged as new light sources for novel applications in areas including spectroscopy, particle manipulation and communications. Reported devices depend on linear optical phenomena and emit light in the near-infrared regime. Here, we propose and numerically evaluate a nonlinear vortex beam emitter that functions in the THz regime. The design utilises a LiNbO3 microring, a Si microdisk, and a Au second-order top grating to convert waveguide-coupled infrared light into a freely propagating THz beam via difference-frequency generation. The output beam carries a topological charge that is tuneable with input wavelengths. Three devices are evaluated in a test frequency range from 9 THz to 13.5 THz, and the topological charge can change from -2 to 4. A frequency shift accompanies the change in the topological charge, and its magnitude depends on the planar dimensions of the emitter.
Pi, Hailong
32718fa6-ab51-4d28-b147-ce16a3235ac7
Rahman, Tasmiat
e7432efa-2683-484d-9ec6-2f9c568d30cd
Boden, Stuart A.
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Ma, Tianjun
e673517f-a2db-4aaa-ba99-2689bdae7dfa
Yan, Jize
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Fang, Xu
96b4b212-496b-4d68-82a4-06df70f94a86
Pi, Hailong
32718fa6-ab51-4d28-b147-ce16a3235ac7
Rahman, Tasmiat
e7432efa-2683-484d-9ec6-2f9c568d30cd
Boden, Stuart A.
83976b65-e90f-42d1-9a01-fe9cfc571bf8
Ma, Tianjun
e673517f-a2db-4aaa-ba99-2689bdae7dfa
Yan, Jize
786dc090-843b-435d-adbe-1d35e8fc5828
Fang, Xu
96b4b212-496b-4d68-82a4-06df70f94a86
Pi, Hailong, Rahman, Tasmiat, Boden, Stuart A., Ma, Tianjun, Yan, Jize and Fang, Xu
(2020)
Integrated vortex beam emitter in the THz frequency range: design and simulation.
APL Photonics.
(doi:10.1063/5.0010546).
Abstract
Compact vortex beam emitters have emerged as new light sources for novel applications in areas including spectroscopy, particle manipulation and communications. Reported devices depend on linear optical phenomena and emit light in the near-infrared regime. Here, we propose and numerically evaluate a nonlinear vortex beam emitter that functions in the THz regime. The design utilises a LiNbO3 microring, a Si microdisk, and a Au second-order top grating to convert waveguide-coupled infrared light into a freely propagating THz beam via difference-frequency generation. The output beam carries a topological charge that is tuneable with input wavelengths. Three devices are evaluated in a test frequency range from 9 THz to 13.5 THz, and the topological charge can change from -2 to 4. A frequency shift accompanies the change in the topological charge, and its magnitude depends on the planar dimensions of the emitter.
Text
Integrated vortex beam emitter in the THz frequency range Design and simulation
- Accepted Manuscript
More information
Accepted/In Press date: 9 June 2020
e-pub ahead of print date: 1 July 2020
Identifiers
Local EPrints ID: 442294
URI: http://eprints.soton.ac.uk/id/eprint/442294
ISSN: 2378-0967
PURE UUID: f46829a3-16fa-42c8-97c8-314b36bef185
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Date deposited: 13 Jul 2020 16:30
Last modified: 17 Mar 2024 03:39
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Contributors
Author:
Hailong Pi
Author:
Tasmiat Rahman
Author:
Stuart A. Boden
Author:
Tianjun Ma
Author:
Xu Fang
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