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Design and Simulation Investigation of Si3N4 Photonics Circuits for Wideband On-Chip Optical Gas Sensing around 2 µm Optical Wavelength

1
Centre de Nanosciences et de Nanotechnologies, Université Paris Sud, CNRS, Université Paris Saclay, 91120 Palaiseau, France
2
Department of Physics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
3
Department of Physics, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand
*
Author to whom correspondence should be addressed.
Academic Editors: Ashim Dhakal and Vittorio M. N. Passaro
Sensors 2021, 21(7), 2513; https://doi.org/10.3390/s21072513
Received: 15 February 2021 / Revised: 25 March 2021 / Accepted: 1 April 2021 / Published: 3 April 2021
(This article belongs to the Special Issue Photonic Integrated Circuits for Spectroscopic Sensing)
We theoretically explore the potential of Si3N4 on SiO2 waveguide platform toward a wideband spectroscopic detection around the optical wavelength of 2 μm. The design of Si3N4 on SiO2 waveguide architectures consisting of a Si3N4 slot waveguide for a wideband on-chip spectroscopic sensing around 2 μm, and a Si3N4 multi-mode interferometer (MMI)-based coupler for light coupling from classical strip waveguide into the identified Si3N4 slot waveguides over a wide spectral range are investigated. We found that a Si3N4 on SiO2 slot waveguide structure can be designed for using as optical interaction part over a spectral range of interest, and the MMI structure can be used to enable broadband optical coupling from a strip to the slot waveguide for wideband multi-gas on-chip spectroscopic sensing. Reasons for the operating spectral range of the system are discussed. View Full-Text
Keywords: Si3N4 on SiO2; multi-mode interferometer; short-wave infrared Si3N4 on SiO2; multi-mode interferometer; short-wave infrared
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MDPI and ACS Style

Koompai, N.; Chaisakul, P.; Limsuwan, P.; Le Roux, X.; Vivien, L.; Marris-Morini, D. Design and Simulation Investigation of Si3N4 Photonics Circuits for Wideband On-Chip Optical Gas Sensing around 2 µm Optical Wavelength. Sensors 2021, 21, 2513. https://doi.org/10.3390/s21072513

AMA Style

Koompai N, Chaisakul P, Limsuwan P, Le Roux X, Vivien L, Marris-Morini D. Design and Simulation Investigation of Si3N4 Photonics Circuits for Wideband On-Chip Optical Gas Sensing around 2 µm Optical Wavelength. Sensors. 2021; 21(7):2513. https://doi.org/10.3390/s21072513

Chicago/Turabian Style

Koompai, Natnicha, Papichaya Chaisakul, Pichet Limsuwan, Xavier Le Roux, Laurent Vivien, and Delphine Marris-Morini. 2021. "Design and Simulation Investigation of Si3N4 Photonics Circuits for Wideband On-Chip Optical Gas Sensing around 2 µm Optical Wavelength" Sensors 21, no. 7: 2513. https://doi.org/10.3390/s21072513

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