Xiao Qingsheng, Klitis Charalambos, Li Shimao, Chen Yueyang, Cai Xinlun, Sorel Marc, Yu Siyuan
Opt Express. 2016 Feb 22;24(4):3168-76. doi: 10.1364/OE.24.003168.
An integrated approach to produce photonic orbital angular momentum (OAM) superposition states with arbitrary OAM spectrum has been demonstrated. Superposition states between two vector OAM modes have been achieved by integrating a superimposed angular grating in one silicon micro-ring resonator, with each mode having near equal weight. The topological charge difference between the two compositional OAM modes is determined by the difference between the numbers of elements in the two original gratings being superimposed, while the absolute values of the topological charge can be changed synchronously by switching WGM resonant wavelengths. This novel approach provides a scalable and flexible source for the OAM-based quantum information and optical manipulation applications.
一种用于产生具有任意轨道角动量（OAM）光谱的光子轨道角动量叠加态的集成方法已得到证明。通过在一个硅微环谐振器中集成一个叠加角光栅，实现了两个矢量OAM模式之间的叠加态，每个模式具有近乎相等的权重。两个组成OAM模式之间的拓扑电荷差由叠加的两个原始光栅中的元素数量之差决定，而拓扑电荷的绝对值可以通过切换回音壁模式（WGM）谐振波长来同步改变。这种新颖的方法为基于OAM的量子信息和光学操纵应用提供了一种可扩展且灵活的光源。
