[17p-A25-2~11] 4.2 Photonics Devices, Photonic Integrated Circuit and Silicon Photonics

3:30 PM - 3:45 PM JST(6:30 AM - 6:45 AM UTC)English Presentation

[17p-A25-4] Modelling of CO₂ Gas Sensing using Spectral Envelope of SoI Integrated Racetrack Resonator

〇(DC)Shalini Vardhan¹, Naveen Kumar Gupta², Aditya Kushwaha¹, Priyanka Verma¹, Ritu Raj Singh¹ (1.Netaji Subhas University of Technology, Dwarka, Sector-3, Delhi-110078, India, 2.Indian Institute of Information Technology, Ranchi- 831014, India)

Keywords:

Silicon on Insulator technology,Silicon photonics,Integrated racetrack resonator

Silicon on Insulator (SoI) technolgy has tantalized the photonic word in terms of device compactness and higher confinement of power in the modelled integrated structure. A gas sensor is proposed for the sensing of Carbon dioxide (CO₂) gas at the places where this gas poses the large emission risk. The modelled device is a micro racetrack resonator working in the wavelength range of 1350 nm to 1850 nm. The materials used for device modeling are silicon as a guiding material, silicon dioxide as a substrate and a CO₂ glass cavity as a cladding. The sensing of gas is done on the basis of change in the refractive index of the spectrum when compared with a referenced spectrum. The concentration of CO₂ gas with air volume fraction is calculated using Lorentz-Lorenz mixing rule. The sensitivity of 595.88 nm/RIU with a shift of 29.21 nm is evaluated to check the performance of the racetrack resonator.