Abstract
A low-loss ridge waveguide is proposed and demonstrated with a novel, to the best of our knowledge, bound state in the continuum (BIC)-based structure on the silicon-on-insulator (SOI) platform. The presented waveguide is designed appropriately to suppress TM-mode leakage, and has a theoretically low propagation loss of ∼0.0027 dB/cm at 1550 nm. In the wavelength range from 1530 nm to 1600 nm, the 2-mm-long waveguide can achieve an average loss suppression of ∼30 dB in the experiment. Such a novel ridge waveguide structure can also be introduced into narrowband optical filters. The fabricated Bragg grating filter working at the TM mode can achieve a narrow bandwidth of ∼1 nm and an extinction ratio of ∼14.8 dB.
© 2023 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Haitao Zhou, Ping Zhong, Sen Jiang, Zhiyuan Gu, and Ying Yu
Opt. Lett. 49(7) 1709-1712 (2024)
Wei Xu, Di Zhang, Xi-Rong Shi, Hai-Yu Meng, Jing Yue, Xiang Zhai, Sheng-Xuan Xia, Hong-Ju Li, and Ling-Ling Wang
Opt. Lett. 48(23) 6088-6091 (2023)
Haochuan Li, Mingchu Tang, Taojie Zhou, Wentao Xie, Renjie Li, Yuanhao Gong, Mickael Martin, Thierry Baron, Siming Chen, Huiyun Liu, and Zhaoyu Zhang
Opt. Lett. 48(7) 1702-1705 (2023)