Fig. 1. Schematic of two-beam coupling experiment

Fig. 2. Self-diffraction geometry of thin phase grating under applied DC voltage of 2.5 V

Fig. 3. Self-asymmetric diffraction pattern of phase grating under applied DC voltage of 2.5 V

Fig. 4. Diffraction intensity of all the orders at DC voltage of 2.5 V

Fig. 5. Dynamic processes of the first-order diffraction of grating under applied DC voltage of 2.5 V

Fig. 6. Schematic diagram for constructing an asymmetric phase grating model

Fig. 7. Simulation results of asymmetric saw-tooth profile phase grating