Mid-infrared nonlinear optics in thin-film lithium niobate on sapphire
Abstract
Periodically poled thin-film lithium niobate (TFLN) waveguides have emerged as a leading platform for highly efficient frequency conversion in the near-infrared. However, the commonly used silica bottom-cladding results in high absorption loss at wavelengths beyond 2.5 m. In this work, we demonstrate efficient frequency conversion in a TFLN-on-sapphire platform, which features high transparency up to 4.5 m. In particular, we report generating mid-infrared light up to 3.66 m via difference-frequency generation of a fixed 1-m source and a tunable telecom source, with normalized efficiencies up to 200%/W-cm. These results show TFLN-on-sapphire to be a promising platform for integrated nonlinear nanophotonics in the mid-infrared.
Keywords
Cite
@article{arxiv.2104.05990,
title = {Mid-infrared nonlinear optics in thin-film lithium niobate on sapphire},
author = {Jatadhari Mishra and Timothy P. McKenna and Edwin Ng and Hubert S. Stokowski and Marc Jankowski and Carsten Langrock and David Heydari and Hideo Mabuchi and M. M. Fejer and Amir H. Safavi-Naeini},
journal= {arXiv preprint arXiv:2104.05990},
year = {2021}
}
Comments
The first four authors contributed equally to this work. 5 pages, 3 figures