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在完整的二维正方晶格硅(Si)中,引入线缺陷(波导)和磁光子晶体点缺陷(微腔),利用磁性材料的磁导率随磁场的变化,通过波导和微腔的耦合,提出了一种基于磁光子晶体的三通道太赫兹(THz)波选路开关。利用平面波展开法(PWM)和时域有限差分法(FDTD),对基于磁光子晶体的三通道THz波选路开关进行了仿真研究。结果表明,选路开关通道1的消光比(EXT)为12.74dB,通道2和通道3的EXT都为28.05dB,响应速度可达ps量级。利用本方案实现的THz波选路开关,在未来的集成光路中具有很好的应用前景。
In the complete two-dimensional square lattice silicon (Si), the introduction of line defects (waveguide) and magnetic photonic crystal point defects (microcavity), the permeability of magnetic materials with the magnetic field changes through the waveguide and microcavity coupling , A three-channel terahertz (THz) wave routing switch based on magneto-photonic crystals was proposed. The three-channel THz wave routing switch based on magneto-photonic crystal was simulated by using plane wave expansion method (PWM) and time-domain finite difference method (FDTD). The results show that extinction ratio (EXT) of channel 1 switch is 12.74 dB, EXT of channel 2 and channel 3 is 28.05 dB, and the response speed can reach ps order. The use of this program to achieve THz wave routing switch in the future integrated optical path has a very good application prospects.