Fig. 1. Structure of the G-T resonator

Fig. 2. Phase shift of the reflected light from the G-T resonator varies with the refractive index

Fig. 3. Spatial two-dimensional optical phased array mirror based on G-T resonator. (a) Two-dimensional phased array model; (b) single G-T resonator

Fig. 4. Relationship between the pairs of DBR and reflectivity at 1550 nm

Fig. 5. Simulation of the G-T resonator. (a) Change curve of the reflectance with refractive index; (b) change curve of the phase shift with refractive index

Fig. 6. Distribution of the far field beam

Fig. 7. Distribution of the far field beam. (a) Phase difference between adjacent elements is 0; (b) phase difference between adjacent elements is π