Reduced Material Loss in Thin-film Lithium Niobate Waveguides

By Amirhassan Shams-Ansari, Guanhao Huang, Lingyan He, Zihan Li, Jeffrey Holzgrafe, M. Jankowski, M. Churaev, P. Kharel, Rebecca Cheng, Di Zhu and 5 more. 2022

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Thin-film lithium niobate has shown promise for scalable applications ranging from single-photon sources to high-bandwidth data communication systems. Realization of the next generation high-performance classical and quantum devices, however, requires much lower optical losses than the current state of the art ($\sim$10 million). Unfortunately, material limitations of ion-sliced thin-film lithium niobate have not been explored, and therefore it is unclear how high-quality factor can be achieved in this platform. Here we evaluate the material limited quality factor of thin-film lithium niobate photonic platform can be as high as $Q\approx 1.8\times10^{8}$ at telecommunication wavelengths, corresponding to a propagation loss of 0.2 dB/m.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/8cc5a12fa06f1cac1cd432191a8cdc218327c6b2