Robust one-way modes in gyromagnetic photonic crystal waveguides with different interfaces
Robust one-way modes in gyromagnetic photonic crystal waveguides with different interfaces
复制标题
具有不同界面的旋磁光子晶体波导中的鲁棒单向模式
DOI：
10.1063/1.3470873
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发表时间：
2010-07-26
影响因子：
4
通讯作者：
Li, Zhi-Yuan
中科院分区：
文献类型：
--
作者：
Fu, Jin-Xin;Liu, Rong-Juan;Li, Zhi-Yuan
实验上实现了由旋磁光子晶体(GPC)和普通介质光子晶体在其共同的光子带隙中形成的单向光波导。由于GPC在直流磁场作用下的时间反转对称性破缺，边缘模表现出单向性。我们研究了不同波导宽度的手征边缘态产生的单向传输特性。对于不同的波导宽度，前向模和后向模都表现出明显的频移，前向模对各种障碍物具有较强的鲁棒性。利用传输矩阵法和多重散射法进行的数值模拟与实验数据吻合较好。(C)2010年美国物理研究所。[DOI：10.1063/1.3470873]
We experimentally realize a one-way waveguide made from a gyromagnetic photonic crystal (GPC) and a normal dielectric photonic crystal in their common photonic band gap. Due to the time reversal symmetry breaking of the GPC under a dc magnetic field, the edge modes exhibit a one-way property. We investigate the unidirectional propagation character originating from the chiral edge states at different widths of the waveguide. Both the forward modes, which are robust to various obstacles, and the backward modes show an obvious frequency shift for different waveguide widths. Numerical simulations by means of the transfer-matrix method and multiple scattering methods agree well with the experimental data. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3470873]