• Chinese Optics Letters
  • Vol. 19, Issue 6, 060007 (2021)
Biao Mu1, Xianfang Wu1, Yunfei Niu1, Yan Chen1, Xinlun Cai2, Yanxiao Gong1, Zhenda Xie1, Xiaopeng Hu1、*, and Shining Zhu1
Author Affiliations
  • 1National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, College of Electronic Science and Engineering, and School of Physics, Nanjing University, Nanjing 210093, China
  • 2State Key Laboratory of Optoelectronic Materials and Technologies and School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
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    Abstract

    Periodically poled lithium niobate on insulator (LNOI) ridge waveguides are desirable for high-efficiency nonlinear frequency conversions, and the fabrication process of such waveguides is crucial for device performance. In this work, we report fabrication and characterization of locally periodically poled ridge waveguides. Ridge waveguides were fabricated by dry etching, and then the high-voltage pulses were applied to locally poled ridge waveguides. Second harmonic generation with normalized conversion efficiency of 435.5% W-1·cm-2 was obtained in the periodically poled LNOI ridge waveguide, which was consistent with the triangular domain structure revealed by confocal microscopy.

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    Biao Mu, Xianfang Wu, Yunfei Niu, Yan Chen, Xinlun Cai, Yanxiao Gong, Zhenda Xie, Xiaopeng Hu, Shining Zhu. Locally periodically poled LNOI ridge waveguide for second harmonic generation [Invited][J]. Chinese Optics Letters, 2021, 19(6): 060007
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    Received: Feb. 21, 2021
    Accepted: Mar. 26, 2021
    Published Online: Apr. 27, 2021
    The Author Email: Xiaopeng Hu (xphu@nju.edu.cn)