Fig. 1. Design principle of caustic

Fig. 2. Numerical simulation results of self-accelerating light field propagating along different trajectories. (a) y=0.01x^1/2; (b) y=50x²; (c) y=3000x³; (d) y=10^-4ln(100x)

Fig. 3. Model and simulation results. (a) Multilayer dielectric structure; (b) electric field intensity distribution of non-diffraction BSWs excited by TE wave

Fig. 4. Relationship between simulation results of transmission characteristics of BSWs and grating period, depth, and duty cycle. (a) Period; (b) depth; (c) duty cycle

Fig. 5. Principle of grating structure construction. (a) Curve of initial phase distribution; (b) phase distribution projection result; (c) curve of grating structure distribution; (d) schematic of grating structure

Fig. 6. Propagations of BSWs with different trajectories excited by proposed grating structure. (a) y=20000x²; (b) y=200x^3/2; (c) y=10^-5ln(5000x)