4H–SiC microring resonators—Opportunities for nonlinear integrated optics

作者：Adnan Ali Afridi, Yaoqin Lu, Xiaodong Shi, Ruixuan Wang, Jingwei Li, Qing Li, Haiyan Ou · 发表于：Applied Physics Letters · 年份：2024 · DOI：10.1063/5.0198517 · 被引用次数：18 · 研究领域：Advanced Fiber Laser Technologies、Photonic and Optical Devices、Advanced Fiber Optic Sensors

Silicon carbide, a wide bandgap semiconductor material platform, has emerged as an exceptional material for nonlinear integrated photonics. Among the different poly-structures, 4H-silicon carbide-on-insulator stacks show promising results to their low loss, which are crucial for commercial applications like communication, metrology, and spectroscopy. High Q-values and low-loss microring resonators are imperative for miniaturization and photonic integration in these applications. This Perspective emphasizes recent advancements in enhancing the quality factor of microresonators based on 4H-silicon carbide, as well as the strides made in experimental results of third-order nonlinearities. Furthermore, this Letter addresses and outlines the prospects of integrating 4H-silicon carbide microring resonators into frequency comb technologies and potential applications.