Inverse-designed broadband low-loss grating coupler on thick lithium-niobate-on-insulator platform
Optics
2023-09-25 v1 Applied Physics
Abstract
A grating coupler on 700-nm-thick Z-cut lithium-niobate-on-insulator platform with high coupling efficiency, large bandwidth, and high fabrication tolerance is designed and optimized by inverse design method. The optimized grating coupler is fabricated with a single set of e-beam lithography and etching process, and it is experimentally characterized to possess peak coupling efficiency of -3.8 dB at 1574.93 nm, 1-dB bandwidth of 71.7 nm, and 3-dB bandwidth of over 120 nm.
Keywords
Cite
@article{arxiv.2309.12976,
title = {Inverse-designed broadband low-loss grating coupler on thick lithium-niobate-on-insulator platform},
author = {Yijun Xie and Mingming Nie and Shu-Wei Huang},
journal= {arXiv preprint arXiv:2309.12976},
year = {2023}
}
Comments
8 pages, 4 figures