Numerical Simulation Study of Water Salinity Optical Sensors Using Nano-Slot and Slab Waveguides

This paper aims to address the critical necessity for efficient methods of measuring salinity, considering its substantial impact on water quality across diverse applications. Conventional techniques, often cumbersome and time-consuming, underscore the urgent need for innovative and economically viable alternatives. This study proposes an optical approach to salinity detection utilizing both nano-slot and slab waveguide-based sensing platforms, offering advantages in terms of sensitivity, real-time monitoring, and cost-effectiveness. Advanced numerical simulations are employed to evaluate the efficacy of these platforms in detecting salinity levels. Theoretical analysis and computational modelling are conducted to delve into the intricate interplay between the two different waveguides and various salinity concentrations. The outcomes of this research endeavor aim to furnish valuable insights into the potential of these platforms for efficient salinity detection.