Fig. 1. （a）Schematic diagram of liquid crystal sample structure；（b）Schematic diagram of working principle. The blue area in Figure（b）represents the applied voltage area，and the refractive index of the liquid crystal changes from initial n_o to n_e（n_o<n_e）.

Fig. 2. （a）Collection of image data and photos of high and low voltage signals taken in sequence；（b）Reading of the grayscale difference data in the yellow box；（c）Distribution of grayscale values along the X-axis.

Fig. 3. Deflection of the exit spot position with voltage

Fig. 4. Variation of the deflection angle of the light spot at the exit end with the intensity of the voltage signal

Fig. 5. （a）Response curves of the signal intensity of the liquid crystal box with high voltage；（b）Change curves of response time with high voltage V_max through signal strength（when there is no signal passing，the photodetector signal is 3.2 mV）.

Fig. 6. （a）Test drive signals with different bias voltages；（b）Maintain the high voltage signal V_max unchanged and gradually increase the response signal curve of the LCD cell with a bias voltage V_min；（c）Corresponding change in transmission signal strength（difference between maximum and minimum transmission signal strength），response time curve with high voltage（when there is no signal passing，the photodetector signal is 3.2 mV）.