Abstract
An ultra-broadband TM-pass polarizer is designed, fabricated, and experimentally demonstrated based on subwavelength grating (SWG) metamaterials in a lithium niobate on an insulator (LNOI) platform. According to our simulation, the designed device is predicted to work at a 220 nm wavelength range from 1460 to 1680 nm, covering the S-, C-, L-, U-bands of optical fiber communication. By depositing and subsequently etching a silicon nitride thin film atop the LNOI chip, the SWG structures are formed successfully by using complementary metal–oxide semiconductor (CMOS)-compatible fabrication processes. The measured results show a high polarization extinction ratio larger than 20 dB and a relatively low insertion loss below 2.5 dB over a 130 nm wavelength range from 1500 to 1630 nm, mainly limited by the operation bandwidth of our laser source.
© 2024 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Yang Liu, Xingrui Huang, Zezheng Li, Yingxin Kuang, Huan Guan, Qingquan Wei, Zhongchao Fan, and Zhiyong Li
Opt. Lett. 45(17) 4915-4918 (2020)
Jing Huang, Nuo Chen, Kaizhong Chen, and Tao Chu
Opt. Lett. 49(2) 222-225 (2024)
Yong Zhao, Shengping Liu, Yuechun Shi, Lijun Hao, Yuxin Ma, Pan Dai, Guilin Liu, Yi Ni, and Xiangfei Chen
Opt. Lett. 49(4) 834-837 (2024)