Simulation of Bio-medical Waveguide in Mechanical and Optical fields
This paper presents a freestanding waveguide to achieve the goal of detecting anastomosis leakage after colon surgery. The freestanding part is a thin membrane consisting of TiO2 rib and SiN ridge. This freestanding waveguide is designed both mechanically and optically to maintain mechanical stability during fabrication and detection process, and at the same time guarantee the detection sensitivity. It utilises evanescent waves to detect the bacteria captured on both surfaces in freestanding area. Cladding factors and stress induced deformation are considered here to optimise the parameters. Through simulations, the final parameters are chosen to meet the medical requirements.