https://doi.org/10.1051/epjconf/202430901009
Novel high contrast grating hollow core waveguides for enhanced gas spectroscopy
1 Department of Electrical and Information Engineering, Politecnico di Bari, 70126, Bari, Italy
2 Centre for Advanced Photonics and Process Analysis, Munster Technological University, T12 T66T Cork, Ireland
3 Tyndall National Institute, T12 PX46 Cork, Ireland
* Corresponding author: ajmal.thottoli@poliba.it
Published online: 31 October 2024
The article presents an innovative approach to confining waves in planar high contrast grating hollow core waveguides, design achieves a surface that reflects waves effectively while maintaining a structure that allows for high transmission. The unique side-open waveguide system also allows for gas flow through the sidewalls, making it suitable for gas spectroscopic techniques. The HCW design is specifically tailored for methane gas sensing at a wavelength of 3.27 μm. Numerical analysis shows that the transmittance can reach up to -0.41 dB. These findings demonstrate the potential of high-transmitting hollow-core waveguides for gas sensing, highlighting the effectiveness and cost-efficiency of chip-scale photonic integration.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
