Fig. 1. Schematic of the basic structure

Fig. 2. Forward and backward electric field distribution at 1550 nm with different angles of interface. (a) θ=30°, forward incidence; (b) θ=30°, backward incidence; (c) θ=45°, forward incidence; (d) θ=45°, backward incidence; (e) θ=60°, forward incidence; (f) θ=60°, backward incidence

Fig. 3. Forward and backward transmittance and contrast ratio of the foundation structure. (a) TE polarization mode; (b) TM polarization mode

Fig. 4. Schematic of the heterostructure one

Fig. 5. Band structure of the photonic crystals in the heterostructure one for TE mode. (a) r1/a1=0.32 in the left of the structure; (b) r2/a2=0.4 in the right of the structure

Fig. 6. Forward and backward transmittance and contrast ratio of the heterostructure one in TE polarization mode

Fig. 7. Forward and backward transmittance and contrast ratio of the heterostructure one with different dE. (a) dE=6 μm; (b) dE=7.3 μm; (c) dE=8.7 μm; (d) dE=10 μm

Fig. 8. Backward electric field distribution at 1598 nm in the heterostructure one with different dE. (a) dE=6 μm; (b) dE=7.3 μm; (c) dE=8.7 μm; (d) dE=10 μm

Fig. 9. Schematic of the heterostructure two

Fig. 10. Band structure of the photonic crystals in the heterostructure two. (a) r3/a3=0.19 in the left of the structure; (b) r4/a4=0.4 in the right of the structure

Fig. 11. Forward and backward transmittance and contrast ratio of the heterostructure two in TM polarization mode

Fig. 12. Forward and backward transmittance and contrast ratio of the heterostructure two with different dM. (a) dM=6.6 μm; (b) dM=8 μm; (c) dM=9.2 μm; (d) dM=10 μm

Fig. 13. Electric field distribution of forward at 1557 nm in the heterostructure two with different dM. (a) dM=6.6 μm; (b) dM=8 μm; (c) dM=9.2 μm; (d) dM=10 μm

Fig. 14. Forward and backward transmittance and contrast ratio. (a) Three dimensional heterostructure one; (b) three dimensional heterostructure two