Mid-infrared frequency generation via intermodal difference frequency generation in AlGaAs-on-insulator waveguides
Mid-infrared frequency generation via intermodal difference frequency generation in AlGaAs-on-insulator waveguides
We investigate theoretically mid-infrared (MIR) generation via difference frequency generation in multimode AlGaAs-on insulator (AlGaAs-OI) waveguides. The large refractive index difference between the AlGaAs core and the silica cladding shrinks the modes size down to the sub-μm2 scale, and, together with AlGaAs strong second-order nonlinear polarization, empowers strong nonlinear effects. As a result, efficient MIR generation is obtained in few-cm long waveguides with sub-μm2 transverse section, where higher order modes are exploited to achieve the phase-matching condition. These observations suggest that multimode AlGaAs-OI waveguides could represent a novel promising platform for on-chip, compact MIR sources.
Haines, Jack
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Gandolfi, Marco
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Franz, Yohann
edb6208c-9f65-42c4-965e-b6bc54945602
De angelis, Costantino
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Guasoni, Massimiliano
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16 December 2021
Haines, Jack
467fe47a-9676-4709-95ef-8442a907e067
Gandolfi, Marco
a6e4f836-e7d0-4840-8c4b-6b024dbb4281
Franz, Yohann
edb6208c-9f65-42c4-965e-b6bc54945602
De angelis, Costantino
8d3311bc-d860-4535-985a-59b52adab3f2
Guasoni, Massimiliano
5aa684b2-643e-4598-93d6-bc633870c99a
Haines, Jack, Gandolfi, Marco, Franz, Yohann, De angelis, Costantino and Guasoni, Massimiliano
(2021)
Mid-infrared frequency generation via intermodal difference frequency generation in AlGaAs-on-insulator waveguides.
Frontiers in Photonics, 2, [788174].
(doi:10.3389/fphot.2021.788174).
Abstract
We investigate theoretically mid-infrared (MIR) generation via difference frequency generation in multimode AlGaAs-on insulator (AlGaAs-OI) waveguides. The large refractive index difference between the AlGaAs core and the silica cladding shrinks the modes size down to the sub-μm2 scale, and, together with AlGaAs strong second-order nonlinear polarization, empowers strong nonlinear effects. As a result, efficient MIR generation is obtained in few-cm long waveguides with sub-μm2 transverse section, where higher order modes are exploited to achieve the phase-matching condition. These observations suggest that multimode AlGaAs-OI waveguides could represent a novel promising platform for on-chip, compact MIR sources.
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fphot-02-788174
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Accepted/In Press date: 4 November 2021
Published date: 16 December 2021
Identifiers
Local EPrints ID: 498300
URI: http://eprints.soton.ac.uk/id/eprint/498300
ISSN: 2673-6853
PURE UUID: 36231a17-5914-4c83-880e-2159b10de9db
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Date deposited: 14 Feb 2025 17:34
Last modified: 21 Aug 2025 03:45
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Author:
Jack Haines
Author:
Marco Gandolfi
Author:
Yohann Franz
Author:
Costantino De angelis
Author:
Massimiliano Guasoni
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