Optimization of silicon waveguides for gas detection application at mid-IR wavelengths

M. A. Butt; E. S. Kozlova

doi:10.1117/12.2311944

26 April 2018 Optimization of silicon waveguides for gas detection application at mid-IR wavelengths

M. A. Butt, E. S. Kozlova

Proceedings Volume 10717, Saratov Fall Meeting 2017: Laser Physics and Photonics XVIII; and Computational Biophysics and Analysis of Biomedical Data IV; 1071704 (2018) https://doi.org/10.1117/12.2311944
Event: Saratov Fall Meeting 2017, 2017, Saratov, Russian Federation

Abstract

There are several trace gases such as N₂O, CO, CO₂, NO, H₂O, NO₂, NH₃, CH₄etc. which have their absorption peaks in Mid-IR spectrum These gases strongly absorb in the mid-IR > 2.5 μm spectral region due to their fundamental rotational and vibrational transitions. In this work, we modelled and optimized three different kinds of waveguides such as rib, strip and slot based on silicon platform to obtain maximum evanescent field ratio. These waveguides are designed at 3.39 μm and 4.67 μm which correspond to the absorption line of methane (CH₄) and carbon monoxide (CO) respectively.

Citation Download Citation

M. A. Butt and E. S. Kozlova "Optimization of silicon waveguides for gas detection application at mid-IR wavelengths", Proc. SPIE 10717, Saratov Fall Meeting 2017: Laser Physics and Photonics XVIII; and Computational Biophysics and Analysis of Biomedical Data IV, 1071704 (26 April 2018); https://doi.org/10.1117/12.2311944

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KEYWORDS

Waveguides

Absorption

Mid-IR

Polarization

Silicon

Carbon monoxide

Sensors

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