Design and performance analysis of glucose concentration sensor based on silicon-on-insulator microring resonator

Abstract

Integrated silicon photonics has become a relevant field for research in modern technology due to its promising platform for easy compatibility with Complementary Metal-Oxide Semiconductor (CMOS) fabrication processes. This has led to huge improvements in the design and implementation of chip-based photonic integrated circuits including microring resonators. In this study, a microring resonator has been designed and simulated by using the Finite Difference Time Domain (FDTD) algorithm in the software ANSYS Lumerical MODE Solutions. The designed microring resonator has the add-drop configuration whereby the ring waveguide is in between two parallel bus waveguides. Different concentrations of glucose ranging from 0-160 g/dl were considered to study the performance of the sensor. A change in the glucose concentration or refractive index causes a shift in the resonance wavelength. This shift in resonance wavelength is the principle upon which microring resonators function. The simulation results show an accurate approximation with other designed simulated results with the sensitivity value at 155.24 nm/RIU, quality factor at 446 and figure of merit at 51.7.