Work

Novel high contrast grating hollow core waveguides for enhanced gas spectroscopy

Year: 2024

Type: article

Abstract: 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.

Source: Springer Link (Chiba Institute of Technology)

DOI: 10.1051/epjconf/202430901009/pdf

Authors: Ajmal Thottoli, Ganga Chinna Rao Devarapu, Antonella D’Orazio, Giovanni Magno, Liam O’Faolain

Institutions: Munster Technological University, Polytechnic University of Bari

Language: English

Topic: Photonic and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: European Commission, Science Foundation Ireland

Awards: G434337789, Photonic Accurate and Portable Sensor Systems Exploiting Photo-Acoustic and Photo-Thermal Based Spectroscopy for Real-Time Outdoor Air Pollution Monitoring