Realizing mode conversion and optical diode effect by coupling photonic crystal waveguides with cavity

Ye Han†,‡^a), Zhang Jin-Qian-Nan^a)‡, Yu Zhong-Yuan^a), Wang Dong-Lin^b), Chen Zhi-Hui^c)

(a) Dispersion curves of even mode and odd mode supported by the W2 waveguide. The inset shows mode profiles at frequency 0.3750 c / a . (b) Schematic diagram and two mode profiles of the L2 cavity with Λ = 0.2 a .