Ammonia Gas Optical Sensor Based on Lossy Mode Resonances

Dayron Armas; Pablo Zubiate; Carlos Ruiz Zamarreno; Ignacio R. Matias

doi:10.1109/LSENS.2023.3301843

Ammonia Gas Optical Sensor Based on Lossy Mode Resonances

Dayron Armas^*
, Pablo Zubiate
, Carlos Ruiz Zamarreno
, Ignacio R. Matias

^*Corresponding author for this work

Public University of Navarre

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

This letter presents the fabrication and characterization of an ammonia (NH₃) gas optical sensor based on lossy mode resonances (LMRs). A chromium (III) oxide (Cr₂O₃) thin film deposited onto a planar waveguide was used as LMR supporting coating. The obtained LMR shows a maximum attenuation wavelength or resonance wavelength centered at 673 nm. The optical properties of the coating can be modified as a function of the presence and concentration of NH₃ in the external medium. Consequently, the refractive index of the Cr₂O₃ thin film will change, producing a red-shift of the resonance wavelength. Obtained devices were tested for different concentrations of NH₃ as well as repetitive cycles. Concentrations as low as 10 ppbv of NH₃ were detected at room temperature. Machine learning regression models were used to mitigate the cross-sensitivity of the device under temperature and humidity fluctuations.

Original language	English
Article number	2001204
Journal	IEEE Sensors Letters
Volume	7
Issue number	8
DOIs	https://doi.org/10.1109/LSENS.2023.3301843
Publication status	Published - 1 Aug 2023
Externally published	Yes

Keywords

Sensor materials
ammonia gas sensor
lossy mode resonance (LMR)
machine learning
planar waveguides

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10.1109/LSENS.2023.3301843

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title = "Ammonia Gas Optical Sensor Based on Lossy Mode Resonances",

abstract = "This letter presents the fabrication and characterization of an ammonia (NH3) gas optical sensor based on lossy mode resonances (LMRs). A chromium (III) oxide (Cr2O3) thin film deposited onto a planar waveguide was used as LMR supporting coating. The obtained LMR shows a maximum attenuation wavelength or resonance wavelength centered at 673 nm. The optical properties of the coating can be modified as a function of the presence and concentration of NH3 in the external medium. Consequently, the refractive index of the Cr2O3 thin film will change, producing a red-shift of the resonance wavelength. Obtained devices were tested for different concentrations of NH3 as well as repetitive cycles. Concentrations as low as 10 ppbv of NH3 were detected at room temperature. Machine learning regression models were used to mitigate the cross-sensitivity of the device under temperature and humidity fluctuations.",

keywords = "Sensor materials, ammonia gas sensor, lossy mode resonance (LMR), machine learning, planar waveguides",

author = "Dayron Armas and Pablo Zubiate and \{Ruiz Zamarreno\}, Carlos and Matias, \{Ignacio R.\}",

note = "Publisher Copyright: {\textcopyright} 2017 IEEE.",

year = "2023",

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doi = "10.1109/LSENS.2023.3301843",

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AU - Armas, Dayron

AU - Zubiate, Pablo

AU - Ruiz Zamarreno, Carlos

AU - Matias, Ignacio R.

PY - 2023/8/1

Y1 - 2023/8/1

N2 - This letter presents the fabrication and characterization of an ammonia (NH3) gas optical sensor based on lossy mode resonances (LMRs). A chromium (III) oxide (Cr2O3) thin film deposited onto a planar waveguide was used as LMR supporting coating. The obtained LMR shows a maximum attenuation wavelength or resonance wavelength centered at 673 nm. The optical properties of the coating can be modified as a function of the presence and concentration of NH3 in the external medium. Consequently, the refractive index of the Cr2O3 thin film will change, producing a red-shift of the resonance wavelength. Obtained devices were tested for different concentrations of NH3 as well as repetitive cycles. Concentrations as low as 10 ppbv of NH3 were detected at room temperature. Machine learning regression models were used to mitigate the cross-sensitivity of the device under temperature and humidity fluctuations.

AB - This letter presents the fabrication and characterization of an ammonia (NH3) gas optical sensor based on lossy mode resonances (LMRs). A chromium (III) oxide (Cr2O3) thin film deposited onto a planar waveguide was used as LMR supporting coating. The obtained LMR shows a maximum attenuation wavelength or resonance wavelength centered at 673 nm. The optical properties of the coating can be modified as a function of the presence and concentration of NH3 in the external medium. Consequently, the refractive index of the Cr2O3 thin film will change, producing a red-shift of the resonance wavelength. Obtained devices were tested for different concentrations of NH3 as well as repetitive cycles. Concentrations as low as 10 ppbv of NH3 were detected at room temperature. Machine learning regression models were used to mitigate the cross-sensitivity of the device under temperature and humidity fluctuations.

KW - Sensor materials

KW - ammonia gas sensor

KW - lossy mode resonance (LMR)

KW - machine learning

KW - planar waveguides

UR - https://www.scopus.com/pages/publications/85166757985

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DO - 10.1109/LSENS.2023.3301843

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VL - 7

JO - IEEE Sensors Letters

JF - IEEE Sensors Letters

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ER -

Ammonia Gas Optical Sensor Based on Lossy Mode Resonances

Abstract

Keywords

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