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Facile approach for the periodic poling of MgO-doped lithium niobate with liquid electrodes

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Abstract

Emerging quantum communication applications have advanced the rapid development of up-conversion single-photon detectors and entangled photon-pair sources, of which the core components are both based on frequency conversion in periodically poled lithium niobate (PPLN) waveguides. MgO-Doped congruent lithium niobate (Mg:LN) is known as the most promising material for the fabrication of PPLN because of its attractive properties, but the leakage current complicates the high-quality periodic poling of Mg:LN, especially regarding its use with liquid electrodes. In this paper, we demonstrated an effective approach to suppress the leakage current by using a SiO2 dielectric layer of appropriate thickness, and high-quality periodic poling has been realized in 5 mol% Mg:LN wafers with a diameter of 76.2 mm based on the electric-field poling method using liquid electrodes. The ease of the clear removal of the liquid electrodes is beneficial for the fabrication of waveguides on the wafer surface, and the wafer-level manufacture of PPMgLN with easy operation and high rate of finished products facilitates the mass production of PPMgLN devices for quantum communication applications.

Graphical abstract: Facile approach for the periodic poling of MgO-doped lithium niobate with liquid electrodes

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Publication details

The article was received on 13 Oct 2018, accepted on 04 Jan 2019 and first published on 07 Jan 2019


Article type: Communication
DOI: 10.1039/C8CE01748D
Citation: CrystEngComm, 2019, Advance Article
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    Facile approach for the periodic poling of MgO-doped lithium niobate with liquid electrodes

    L. Liang, F. Wang, Y. Sang, F. Zhou, X. Xie, D. Sun, M. Zheng and H. Liu, CrystEngComm, 2019, Advance Article , DOI: 10.1039/C8CE01748D

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