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Integrated vortex beam emitter in the THz frequency range: design and simulation

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.
2378-0967
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
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. (In Press)

Record type: Article

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.

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Integrated vortex beam emitter in the THz frequency range Design and simulation - Accepted Manuscript
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Accepted/In Press date: 9 June 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
ORCID for Stuart A. Boden: ORCID iD orcid.org/0000-0002-4232-1828
ORCID for Jize Yan: ORCID iD orcid.org/0000-0002-2886-2847
ORCID for Xu Fang: ORCID iD orcid.org/0000-0003-1735-2654

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Date deposited: 13 Jul 2020 16:30
Last modified: 09 Oct 2020 04:02

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Contributors

Author: Hailong Pi
Author: Tasmiat Rahman
Author: Stuart A. Boden ORCID iD
Author: Tianjun Ma
Author: Jize Yan ORCID iD
Author: Xu Fang ORCID iD

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