Photonics Research, Volume. 6, Issue 8, 789(2018)

Femtosecond laser-induced periodic surface structures on lithium niobate crystal benefiting from sample heating

Qiang Li1, Qiang Wu1,2、*, Yanan Li1, Chunling Zhang1, Zixi Jia1, Jianghong Yao1,3, Jun Sun1,2, and Jingjun Xu1,2
Author Affiliations
  • 1Key Laboratory of Weak-Light Nonlinear Photonics, Ministry of Education, TEDA Institute of Applied Physics and School of Physics, Nankai University, Tianjin 300457, China
  • 2Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
  • 3e-mail: yaojh@nankai.edu.cn
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    Figures & Tables(4)
    Schematic illustration of the experimental setup. HWP, half-wave plate; GTP, Glan–Taylor polarizer; L1, convex lens of focal length 50 cm; LN, lithium niobate; PC, personal computer.
    SEM images of a fs laser processed LN surface in N2 environment with sample temperature of (a) 28°C, (b) 100°C, (c) 200°C, (d) 300°C, (e) 400°C, (f) 500°C, (g) 600°C, and (h) 800°C, respectively. Fluence, 7.0 kJ/m2; N2 pressure, 500 Torr; scanning speed, 2 mm/s. The red double arrow indicates the direction of polarization of the incident laser.
    (a) Absorption spectra of fs laser processed LN; (b) absorption at 800 nm dependence of LN processed under the different temperatures. All samples were fabricated with the fluence of 7.0 kJ/m2 at 2 mm/s scanning speed, 500 Torr N2 pressure, and the temperatures of 28°C, 100°C, 200°C, 300°C, 400°C, 500°C, 600°C, and 800°C, respectively.
    SEM images of the periodic surface structures formed by the irradiation of a linearly polarized laser under the sample temperature of 500°C. Fluences: (a) 5.0, (b) 6.0, (c) 7.0, (d) 8.0 kJ/m2, respectively. The red double arrow indicates the direction of polarization of the incident laser.
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    Qiang Li, Qiang Wu, Yanan Li, Chunling Zhang, Zixi Jia, Jianghong Yao, Jun Sun, Jingjun Xu. Femtosecond laser-induced periodic surface structures on lithium niobate crystal benefiting from sample heating[J]. Photonics Research, 2018, 6(8): 789

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    Paper Information

    Category: Ultrafast Optics

    Received: Feb. 7, 2018

    Accepted: Jun. 5, 2018

    Published Online: Aug. 1, 2018

    The Author Email: Qiang Wu (wuqiang@nankai.edu.cn)

    DOI:10.1364/PRJ.6.000789

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