@inproceedings{29c7e82f003e43e68cc5905fda85deac,
title = "Quasi-phase matching in periodically-grooved thin-film lithium niobate waveguides",
abstract = "Lithium niobate on insulator platform, with excellent light confinement and second order nonlinearity, has recently attracted great interest for applications towards next-generation wavelength conversion systems that are highly efficient and can be densely fabricated. Here we propose and experimentally demonstrated efficient quasi-phase matched second harmonic generation in periodically-grooved lithium niobate waveguides with sub-micron dimensions. We show that, an additional momentum kick induced by periodically modulating the waveguide width could be used to compensate for the phase mismatch between the two fundamental modes at pump and second harmonic wavelengths. We measure normalized conversion efficiencies as high as 7.0\% W-1cm-2 from the fabricated devices. This system is promising for future on-chip quantum wavelength conversion.",
keywords = "Waveguides, Second-harmonic generation, Lithium niobate, Modulation, Wave propagation, Thin films, Avalanche photodetectors, Phase matching, Scattering, Silicon",
author = "Cheng Wang and Xiao Xiong and Nicolas Andrade and Vivek Venkataraman and Xi-Feng Ren and Guang-Can Guo and Marko Loncar",
year = "2016",
month = dec,
day = "30",
doi = "10.1117/12.2247593",
language = "English",
isbn = "9781510604773",
series = "Proceedings of SPIE",
publisher = "SPIE",
editor = "Qihuang Gong and Guo, \{Guang-Can \} and Ham, \{Byoung Seung\}",
booktitle = "Quantum and Nonlinear Optics IV",
address = "United States",
note = "SPIE/COS Photonics Asia : Quantum and Nonlinear Optics IV ; Conference date: 12-10-2016 Through 14-10-2016",
}