Sheng Chong, Wang Yao, Chang Yijun, Wang Huiming, Lu Yongheng, Yang Yingyue, Zhu Shining, Jin Xianmin, Liu Hui
National Laboratory of Solid State Microstructures and School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, Jiangsu, 210093, China.
Center for Integrated Quantum Information Technologies (IQIT), School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, 200240, China.
Light Sci Appl. 2022 Aug 1;11(1):243. doi: 10.1038/s41377-022-00931-4.
Topology have prevailed in a variety of branches of physics. And topological defects in cosmology are speculated akin to dislocation or disclination in solids or liquid crystals. With the development of classical and quantum simulation, such speculative topological defects are well-emulated in a variety of condensed matter systems. Especially, the underlying theoretical foundations can be extensively applied to realize novel optical applications. Here, with the aid of transformation optics, we experimentally demonstrated bound vortex light on optical chips by simulating gauge fields of topological linear defects in cosmology through position-dependent coupling coefficients in a deformed photonic graphene. Furthermore, these types of photonic lattices inspired by topological linear defects can simultaneously generate and transport optical vortices, and even can control the orbital angular momentum of photons on integrated optical chips.
拓扑学在物理学的各个分支中都很普遍。宇宙学中的拓扑缺陷被推测类似于固体或液晶中的位错或向错。随着经典和量子模拟的发展，这种推测性的拓扑缺陷在各种凝聚态物质系统中得到了很好的模拟。特别是，其潜在的理论基础可以广泛应用于实现新颖的光学应用。在这里，借助变换光学，我们通过在变形的光子石墨烯中利用位置依赖的耦合系数模拟宇宙学中拓扑线性缺陷的规范场，在光学芯片上通过实验证明了束缚涡旋光。此外，受拓扑线性缺陷启发的这类光子晶格可以同时产生和传输光学涡旋，甚至可以在集成光学芯片上控制光子的轨道角动量。
