Lu Cuicui, Sun Yi-Zhi, Wang Chenyang, Zhang Hongyu, Zhao Wen, Hu Xiaoyong, Xiao Meng, Ding Wei, Liu Yong-Chun, Chan C T
Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education, Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology, Beijing, 100081, China.
Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan, 250358, China.
Nat Commun. 2022 May 11;13(1):2586. doi: 10.1038/s41467-022-30276-w.
The era of Big Data requires nanophotonic chips to have large information processing capacity. Multiple frequency on-chip nanophotonic devices are highly desirable for density integration, but such devices are more susceptible to structural imperfection because of their nano-scale. Topological photonics provides a robust platform for next-generation nanophotonic chips. Here we give an experimental report of an on-chip nanophotonic topological rainbow realized by employing a translational deformation freedom as a synthetic dimension. The topological rainbow can separate, slow, and trap topological photonic states of different frequencies into different positions. A homemade scattering scanning near-field optical microscope with high resolution is introduced to directly measure the topological rainbow effect of the silicon-based photonic chip. The topological rainbow based on synthetic dimension have no restrictions for optical lattice types, symmetries, materials, wavelength band, and is easy for on-chip integration. This work builds a bridge between silicon chip technologies and topological photonics.
大数据时代要求纳米光子芯片具备强大的信息处理能力。多频率片上纳米光子器件对于高密度集成非常理想，但由于其纳米尺度，这类器件更容易受到结构缺陷的影响。拓扑光子学为下一代纳米光子芯片提供了一个稳健的平台。在此，我们给出一份关于通过利用平移变形自由度作为合成维度实现的片上纳米光子拓扑彩虹的实验报告。拓扑彩虹能够将不同频率的拓扑光子态分离、减慢并捕获到不同位置。引入了一台自制的高分辨率散射扫描近场光学显微镜来直接测量硅基光子芯片的拓扑彩虹效应。基于合成维度的拓扑彩虹对光学晶格类型、对称性、材料、波段均无限制，且易于片上集成。这项工作在硅芯片技术和拓扑光子学之间架起了一座桥梁。
