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Mid-infrared silicon-on-insulator waveguides with single-mode propagation over an octave of frequency

Mid-infrared silicon-on-insulator waveguides with single-mode propagation over an octave of frequency
Mid-infrared silicon-on-insulator waveguides with single-mode propagation over an octave of frequency

Increasing the working optical bandwidth of a photonic circuit is important for many applications, in particular chemical sensing at mid-infrared wavelengths. This useful bandwidth is not only limited by the transparency range of waveguide materials, but also the range over which a waveguide is single or multimoded for predictable circuit behaviour. In this work, we show the first experimental demonstration of "endlessly single-mode" waveguiding in silicon photonics. Silicon-on-insulator waveguides were designed, fabricated and characterised at 1.95 μm and 3.80 μm. The waveguides were shown to support low-loss propagation (1.46 ± 0.13 dB/cm loss at 1.95 μm and 1.55 ± 0.35 dB/cm at 3.80 μm) and single-mode propagation was confirmed at 1.95 μm, meaning that only the fundamental mode was present over the wavelength range 1.95 - 3.80 μm. We also present the prospects for the use of these waveguides in sensing applications. Published by Optica Publishing Group.

1094-4087
8560-8570
Stirling, Callum
2b1db9ce-c03c-4380-b371-a92748d7c4b9
Cao, Wei
5202fa2b-a471-45d4-84e9-9104dffdbbfc
Reynolds, Jamie D
96faa744-02ee-458c-8e48-953ea9e54afe
Qu, Zhibo
5b686d3d-a818-4322-be84-2d7e456e6c43
Bradley, Thomas
d4cce4f3-bb69-4e14-baee-cd6a88e38101
Mastronardi, Lorenzo
ea0aef76-de7e-4bdc-85be-1dc62dbf7802
Gardes, Frederic
7a49fc6d-dade-4099-b016-c60737cb5bb2
Nedeljković, Miloš
b64e21c2-1b95-479d-a35c-3456dff8c796
Stirling, Callum
2b1db9ce-c03c-4380-b371-a92748d7c4b9
Cao, Wei
5202fa2b-a471-45d4-84e9-9104dffdbbfc
Reynolds, Jamie D
96faa744-02ee-458c-8e48-953ea9e54afe
Qu, Zhibo
5b686d3d-a818-4322-be84-2d7e456e6c43
Bradley, Thomas
d4cce4f3-bb69-4e14-baee-cd6a88e38101
Mastronardi, Lorenzo
ea0aef76-de7e-4bdc-85be-1dc62dbf7802
Gardes, Frederic
7a49fc6d-dade-4099-b016-c60737cb5bb2
Nedeljković, Miloš
b64e21c2-1b95-479d-a35c-3456dff8c796

Stirling, Callum, Cao, Wei, Reynolds, Jamie D, Qu, Zhibo, Bradley, Thomas, Mastronardi, Lorenzo, Gardes, Frederic and Nedeljković, Miloš (2022) Mid-infrared silicon-on-insulator waveguides with single-mode propagation over an octave of frequency. Optics Express, 30 (6), 8560-8570. (doi:10.1364/OE.448284).

Record type: Article

Abstract

Increasing the working optical bandwidth of a photonic circuit is important for many applications, in particular chemical sensing at mid-infrared wavelengths. This useful bandwidth is not only limited by the transparency range of waveguide materials, but also the range over which a waveguide is single or multimoded for predictable circuit behaviour. In this work, we show the first experimental demonstration of "endlessly single-mode" waveguiding in silicon photonics. Silicon-on-insulator waveguides were designed, fabricated and characterised at 1.95 μm and 3.80 μm. The waveguides were shown to support low-loss propagation (1.46 ± 0.13 dB/cm loss at 1.95 μm and 1.55 ± 0.35 dB/cm at 3.80 μm) and single-mode propagation was confirmed at 1.95 μm, meaning that only the fundamental mode was present over the wavelength range 1.95 - 3.80 μm. We also present the prospects for the use of these waveguides in sensing applications. Published by Optica Publishing Group.

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Accepted/In Press date: 6 December 2021
Published date: 14 March 2022
Additional Information: Funding Information: Engineering and Physical Sciences Research Council (EP/N00762X/1, EP/N013247/1, EP/V047663/1); Royal Academy of Engineering (RF201617/16/33). Publisher Copyright: © 2022 OSA - The Optical Society. All rights reserved.

Identifiers

Local EPrints ID: 453023
URI: http://eprints.soton.ac.uk/id/eprint/453023
ISSN: 1094-4087
PURE UUID: 957f7c02-99c9-4bb2-a4ff-fe2d00249deb
ORCID for Wei Cao: ORCID iD orcid.org/0000-0003-1431-7060
ORCID for Jamie D Reynolds: ORCID iD orcid.org/0000-0002-0072-0134
ORCID for Thomas Bradley: ORCID iD orcid.org/0000-0001-6568-5811
ORCID for Lorenzo Mastronardi: ORCID iD orcid.org/0000-0003-1489-2778
ORCID for Frederic Gardes: ORCID iD orcid.org/0000-0003-1400-3272
ORCID for Miloš Nedeljković: ORCID iD orcid.org/0000-0002-9170-7911

Catalogue record

Date deposited: 07 Jan 2022 17:35
Last modified: 18 Apr 2024 01:46

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Contributors

Author: Callum Stirling
Author: Wei Cao ORCID iD
Author: Jamie D Reynolds ORCID iD
Author: Zhibo Qu
Author: Thomas Bradley ORCID iD
Author: Lorenzo Mastronardi ORCID iD
Author: Frederic Gardes ORCID iD

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