Modeling of Potassium Chloride Sensor with Two Dimensional Optical Nanostructure

Abstract

Presence of potassium chloride concentration in aqueous solution is investigated using optical sensor. Optical sensor is modeled by two dimensional optical nanostructure or photonic crystal structure, which made from silicon materials (background/ substrate) consists of 8×8 air holes containing aqueous potassium chloride solution. Here measurement techniques centered on logarithmic difference of photonic band gap in regard to unlike concentrations of potassium chloride. The photonic band gap is found by means of plane wave expansion scheme. Proposed model is scheduled to quantify the output voltages with respect to same concentrations. Simulation result revealed that potential is measured at photodetector varies logarithmically with respect to potassium chloride concentration, which leads to an accurate measurement of potassium chloride concentration in aqueous potassium chloride solution.