Joint dispersion engineered thin-film PP-LNOI waveguide for broadband and highly efficient frequency conversion from near-infrared to mid-infraredYe Tian, Yang Liu, Zi-Wei Zheng and Zhe KangEur. Phys. J. Plus, 137 8 (2022) 890DOI: https://doi.org/10.1140/epjp/s13360-022-03084-w