Fig. 1. Annular PC structure and parameters.环形孔光子晶体的结构及参数

Fig. 2. Band structure of annular PC.环形孔光子晶体的能带结构

Fig. 3. (a) Triangular annular PC structure; (b) the forward and backward transmission spectra of the TE-like incident light; (c) the forward and backward transmission spectra of the TM-like incident light.(a) 三角形状的环形孔光子晶体; (b)入射光源为类TE模式时的正、反向透过谱; (c) 入射光源为类TM模式时的正、反向透过谱

Fig. 4. Forward (a), (c) and backward (b), (d) field distribution of the TE-like or TM-like light at 0.43 propagating in triangular annular PC. 频率为0.43 时, 类TE或类TM模式光入射到三角形状环形孔光子晶体时的正向(a)和(c)、反向(b)和(d)场分布图

Fig. 5. (a) Annular PC heterostructure； (b) band structure of PC1； (c) forward and backward transmission spectra of the TE-like incident light； (d) forward and backward transmission spectra of the TM-like incident light.(a)环形孔光子晶体异质结结构；(b) PC1的能带结构；(c)入射光源为类TE模式时的正、反向透过谱； (d)入射光源为类TM模式时的正、反向透过谱

Fig. 6. Forward (a), (c) and backward (b), (d) field distribution of the TE-like or TM-like light at 0.43 propagating in the annular PC heterostructure. 频率为0.43 时, 类TE或类TM模式光入射到环形孔光子晶体异质结时的正向(a)和(c)、反向(b和d)场分布图

Fig. 7. (a) Optimized annular PC heterostructure； (b) forward and backward transmission spectra of the TE-like incident light； (c) forward and backward transmission spectra of the TM-like incident light.(a)优化后的环形孔光子晶体异质结结构；(b)入射光源为类TE模式时的正、反向透过谱；(c)入射光源为类TM模式时的正、反向透过谱

Fig. 8. Forward (a), (c) and backward (b), (d) field distribution of the TE-like and TM-like light at 0.43 propagating in the optimized annular PC heterostructure. 频率为0.43 时, 类TE及类TM模式光入射到优化后的环形孔光子晶体异质结时的正向(a)和(c)、反向(b和d)场分布图