Kagami Hibiki, Amemiya Tomohiro, Okada Sho, Wang Yahui, Nishiyama Nobuhiko, Hu Xiao
Opt Lett. 2022 May 1;47(9):2190-2193. doi: 10.1364/OL.454946.
We propose a method for selectively propagating optical vortex modes with specific charge numbers in a photonic integrated circuit (PIC) by using a topological photonic system. Specifically, by performing appropriate band tuning in two photonic structures that comprise a topological waveguide, one specific electromagnetic mode at the Γ point of a band diagram can be excited. Based on theoretical analysis, we successfully propagated optical vortex modes with specific charge numbers over a wide range in the C band in the proposed topological waveguide. The proposed method could be useful in controlling optical vortex signals at the chip level in future orbital angular momentum multiplexing technologies.
我们提出了一种通过使用拓扑光子系统在光子集成电路（PIC）中选择性地传播具有特定电荷数的光学涡旋模式的方法。具体而言，通过在构成拓扑波导的两个光子结构中进行适当的能带调谐，可以激发能带图Γ点处的一种特定电磁模式。基于理论分析，我们在所提出的拓扑波导中成功地在C波段的宽范围内传播了具有特定电荷数的光学涡旋模式。所提出的方法在未来的轨道角动量复用技术中对芯片级光学涡旋信号的控制可能会很有用。
