Design and Simulation of a New Micro-Displacement Sensor Based on Negative Refraction Photonic Crystal

In this paper, design and simulation of a new micro-displacement sensor based on photonic crystal fixed and movable segments is presented. It has been shown that using negative refraction photonic crystal in the fixed segment, the transmitted power is concentrated on the entrance of the movable segment, and the sensor specifications are improved. Based on the FDTD simulation results, the sensitivity, the operational displacement range and the regression coefficient of the proposed sensor are 1.1 (a-1), 0.35a and 0.99848, respectively. The simulation results show that the proposed sensor has a good performance and could well be used in micro-displacement measuring systems.