Silicon Waveguide Sensors for Carbon Dioxide Gas Sensing in the Mid-Infrared Region
Two optical waveguide sensors based on SOS (silicon-on-sapphire) for detecting CO<sub>2</sub> are theoretically proposed. The operational wavelength is 4.23 μm, which is the maximum absorption line of CO<sub>2</sub>. The power confinement factor (η) value is over 40% and 50%,...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-01-01
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| Series: | Photonics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2304-6732/10/2/120 |