Optical gas sensing in the mid-IR using suspended silicon waveguides
| Autor: | Floria Ottonello-Briano, Henrik Rödjegård, Hans Martin, Carlos Errando-Herranz, Hans Sohlström, Kristinn B. Gylfason |
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| Rok vydání: | 2021 |
| Předmět: |
Range (particle radiation)
Silicon photonics Materials science Silicon business.industry Physics::Optics chemistry.chemical_element Astrophysics::Cosmology and Extragalactic Astrophysics Rotational–vibrational spectroscopy law.invention Wavelength chemistry law Optoelectronics business Absorption (electromagnetic radiation) Spectroscopy Waveguide Astrophysics::Galaxy Astrophysics |
| Zdroj: | Integrated Optics: Devices, Materials, and Technologies XXV. |
| DOI: | 10.1117/12.2580648 |
| Popis: | Optical spectroscopy is among the most important chemical analysis techniques, due to its high specificity and long-term stability. For spectroscopic analysis of gas compositions, the mid infrared (mid-IR) region is particularly important, owing to the rovibrational resonances in that spectral range. Hence, there is great interest in miniaturizing and reducing the power consumption of optical spectroscopic sensors, but until recently the mid-IR range has been out of reach. We demonstrate spectroscopic sensing of carbon dioxide using an integrated silicon waveguide at the strong absorption peak at 4.23 µm wavelength. We show different measurement principles that leverage the power of integrated optics in innovative ways. |
| Databáze: | OpenAIRE |
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