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Simultaneous mid-infrared gas sensing and upconversion based on third harmonic generation in cascaded waveguides

Simultaneous mid-infrared gas sensing and upconversion based on third harmonic generation in cascaded waveguides
Simultaneous mid-infrared gas sensing and upconversion based on third harmonic generation in cascaded waveguides
The performance of conventional gas sensors based on light absorption in the mid-infrared are limited by the high-cost and low efficiency of photon detection at these wavelengths. In this paper, cascaded suspended waveguides are proposed and analyzed for mid-infrared gas sensing with enhanced detection limit. The cascaded structure contains two sections in which the first part is optimized for light absorption and the other one is tailored to satisfy the phase matching condition for third harmonic generation toward near-infrared wavelengths. In this configuration, the input mid-infrared light firstly experiences “fingerprint” frequency absorption in the on-chip gas chamber. Consequently, the residuary light produces third harmonic radiation in the second section. Benefiting from the nonlinear relation between pump and harmonic power, the sensitivity of the sensor is significantly improved. Moreover, the signal is up converted from mid-infrared to near-infrared and thus it can be easily detected by efficient near-infrared detectors. The results show that the detection limit can reach the order of nmol/L and the absorption lengths can be reduced to three times shorter comparing to direct mid-infrared detection. The proposed configuration has great potential for high performance on-chip gas sensing.
Photonic sensor, cascaded devices, suspended waveguides, third harmonic generation
1943-0655
1-12
Pan, Jianxing
96318e81-826a-40c3-8a54-4b7d550b0072
Chen, Zhenxing
517a2cd7-92cb-445f-9fd5-c92e46b25955
Huang, Tianye
802c90e3-cb40-4cf2-82f5-ef60d2169bf4
Zeng, Shuwen
2810df72-f064-4c46-b6ab-790595ef866a
Cheng, Zhuo
7f3bd923-890c-4086-8cab-f6f6e515ba4c
Huang, Pan
c5f979dd-91ad-46fb-a027-4b3af8989ace
Zhao, Xiang
d3b16937-8520-43dc-bf02-3a0e0b09f784
Shum, Perry Ping
ff8c91e7-6560-468b-813d-0da021b81f04
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Pan, Jianxing
96318e81-826a-40c3-8a54-4b7d550b0072
Chen, Zhenxing
517a2cd7-92cb-445f-9fd5-c92e46b25955
Huang, Tianye
802c90e3-cb40-4cf2-82f5-ef60d2169bf4
Zeng, Shuwen
2810df72-f064-4c46-b6ab-790595ef866a
Cheng, Zhuo
7f3bd923-890c-4086-8cab-f6f6e515ba4c
Huang, Pan
c5f979dd-91ad-46fb-a027-4b3af8989ace
Zhao, Xiang
d3b16937-8520-43dc-bf02-3a0e0b09f784
Shum, Perry Ping
ff8c91e7-6560-468b-813d-0da021b81f04
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8

Pan, Jianxing, Chen, Zhenxing, Huang, Tianye, Zeng, Shuwen, Cheng, Zhuo, Huang, Pan, Zhao, Xiang, Shum, Perry Ping and Brambilla, Gilberto (2020) Simultaneous mid-infrared gas sensing and upconversion based on third harmonic generation in cascaded waveguides. IEEE Photonics Journal, 12 (2), 1-12, [8972436]. (doi:10.1109/JPHOT.2020.2969975).

Record type: Article

Abstract

The performance of conventional gas sensors based on light absorption in the mid-infrared are limited by the high-cost and low efficiency of photon detection at these wavelengths. In this paper, cascaded suspended waveguides are proposed and analyzed for mid-infrared gas sensing with enhanced detection limit. The cascaded structure contains two sections in which the first part is optimized for light absorption and the other one is tailored to satisfy the phase matching condition for third harmonic generation toward near-infrared wavelengths. In this configuration, the input mid-infrared light firstly experiences “fingerprint” frequency absorption in the on-chip gas chamber. Consequently, the residuary light produces third harmonic radiation in the second section. Benefiting from the nonlinear relation between pump and harmonic power, the sensitivity of the sensor is significantly improved. Moreover, the signal is up converted from mid-infrared to near-infrared and thus it can be easily detected by efficient near-infrared detectors. The results show that the detection limit can reach the order of nmol/L and the absorption lengths can be reduced to three times shorter comparing to direct mid-infrared detection. The proposed configuration has great potential for high performance on-chip gas sensing.

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More information

Accepted/In Press date: 23 January 2020
e-pub ahead of print date: 28 January 2020
Published date: April 2020
Keywords: Photonic sensor, cascaded devices, suspended waveguides, third harmonic generation

Identifiers

Local EPrints ID: 442013
URI: http://eprints.soton.ac.uk/id/eprint/442013
ISSN: 1943-0655
PURE UUID: 50d12cfd-3143-4612-9d5c-00d5ff8399a3
ORCID for Gilberto Brambilla: ORCID iD orcid.org/0000-0002-5730-0499

Catalogue record

Date deposited: 03 Jul 2020 16:38
Last modified: 28 Apr 2022 01:48

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Contributors

Author: Jianxing Pan
Author: Zhenxing Chen
Author: Tianye Huang
Author: Shuwen Zeng
Author: Zhuo Cheng
Author: Pan Huang
Author: Xiang Zhao
Author: Perry Ping Shum

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