Fig. 1. Beam configuration. (a) Beam configuration for compound photonic crystal; (b) projection on xoy plane

Fig. 2. Simulations for beam at different polar angles. (a) 15°; (b) 30°; (c) 45°; (d) 60°

Fig. 3. Simulation results when polarization of k₁ changes. (a) Elliptical polarization; (b) polarization along E_a line; (c) circular polarization; (d) polarization along E_b line

Fig. 4. Simulation results in the “neighbor” cases

Fig. 5. Simulation results in the “interval” cases

Fig. 6. Simulation results when the polarizations of (k₁, k₂, k₃) change simultaneously. (a) Elliptical polarization; (b) polarization along E_a line; (c) circular polarization; (d) polarization along E_b line

Fig. 7. Interference patterns with simultaneous changes of polarization angles γ of four beams. (a) γ=0°; (b) γ=30°; (c) γ=60°; (d) γ=90°

Fig. 8. Simulation results when initial phase of single light beam changes. (a1)--(a4) δ₁=δ₂=δ₃=0, δ₄ changes; (b1)--(b4) δ₁=δ₃=δ₄=0, δ₂ changes; (c1)--(c4) δ₂=δ₃=δ₄=0, δ₁ changes