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Proceedings Paper

Quasi-phase matching in periodically-grooved thin-film lithium niobate waveguides
Author(s): Cheng Wang; Xiao Xiong; Nicolas Andrade; Vivek Venkataraman; Xi-Feng Ren; Guang-Can Guo; Marko Loncar
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Paper 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.

Paper Details

Date Published: 3 November 2016
PDF: 7 pages
Proc. SPIE 10029, Quantum and Nonlinear Optics IV, 100290Z (3 November 2016); doi: 10.1117/12.2247593
Show Author Affiliations
Cheng Wang, Harvard Univ. (United States)
Xiao Xiong, Harvard Univ. (United States)
Univ. of Science and Technology of China (China)
Nicolas Andrade, Harvard Univ. (United States)
Virginia Commonwealth Univ. (United States)
Vivek Venkataraman, Harvard Univ. (United States)
Xi-Feng Ren, Univ. of Science and Technology of China (China)
Guang-Can Guo, Univ. of Science and Technology of China (China)
Marko Loncar, Harvard Univ. (United States)

Published in SPIE Proceedings Vol. 10029:
Quantum and Nonlinear Optics IV
Qihuang Gong; Guang-Can Guo; Byoung Seung Ham, Editor(s)

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