Nonreciprocal optical diffraction by a single layer of gyromagnetic cylinders.
Nonreciprocal optical diffraction by a single layer of gyromagnetic cylinders.
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DOI：
10.1364/oe.22.000537
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发表时间：
2014-01
期刊：
影响因子：
3.8
通讯作者：
Tianhua Guo;Tengfei Li;Mu Yang;H. Cui;Q. Guo;Xuewei Cao;J. Chen
中科院分区：
文献类型：
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作者：
Tianhua Guo;Tengfei Li;Mu Yang;H. Cui;Q. Guo;Xuewei Cao;J. Chen
研究了光波在单层旋磁柱上的衍射。我们发现，一个非零的旋转偶极子动量被激发在一个单一的旋磁柱，因为经典的模拟的塞曼效应的光子角动量态（PAMSs）。因此，不同的集体偶极子模式被激发在旋磁圆柱阵列在相反的入射角。可以观察到非互易光学衍射效应，其中透射和反射系数取决于入射角的符号。提出了一种新的非互易负向传输现象，并进行了数值分析。这项工作突出了PAMSs在操纵光波传播的各种应用中的潜力。
We study the diffraction of optical waves by a single layer of gyromagnetic cylinders. We show that a nonvanishing rotating dipole momentum is excited in a single gyromagnetic cylinder because of the classic analog of the Zeeman effect on photonic angular momentum states (PAMSs). Consequently, different collective dipole modes are excited in a gyromagnetic cylinder array at opposite incident angles. Nonreciprocal optical diffraction effects can be observed, where the transmission and reflection coefficients depend on the sign of the incident angle. A novel phenomenon of nonreciprocal negative directional transmission is demonstrated and numerically analyzed. This work highlights the potential of PAMSs in manipulating the propagation of optical waves for various applications.