Design of nonreciprocal waveguide devices based on two-dimensional magneto-optical photonic crystals

• A kind of isolator is designed with good performances and easy to fabricate.
• A kind of circulator is designed with new and simple waveguide cross structure.
• A crossing waveguide is designed with large bandwidth and low crosstalk.

AbstractIsolator, circulator and crossing waveguide devices based on two-dimensional magneto-optical photonic crystals were designed. The dispersion relation, mode distribution and transmission spectrum for these nonreciprocal devices were analysed using the finite element method. An isolator, a four-port circulator and a low-crosstalk crossing waveguide with a continual one-way transmission bandwidth of 10.6%, a circulation bandwidth of 4.7% and a low-crosstalk bandwidth of 16.6% were fabricated, respectively.