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Opto-Electronic Science, Volume. 1, Issue 6, 210013(2022)

Giant and light modifiable third-order optical nonlinearity in a free-standing h-BN film

Jun Ren1...2, Han Lin1,5,6, Xiaorui Zheng1, Weiwei Lei3, Dan Liu3, Tianling Ren2, Pu Wang4, and Baohua Jia1,56,* |Show fewer author(s)
Author Affiliations
  • 1Centre for Translational Atomaterials, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, P. O. Box 218, Hawthorn, Victoria 3122, Australia
  • 2School of Integrated circuits, Tsinghua University, Haidian, Beijing 100084, China
  • 3Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia
  • 4Institute of Laser Engineering, Beijing University of Technology, Chaoyang, Beijing 100124, China
  • 5The Australian Research Council (ARC) Industrial Transformation Training, Centre in Surface Engineering for Advanced Materials (SEAM), Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
  • 6School of Science, RMIT University, Melbourne, Victoria 3000, Australia
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    (a) Photo of the freestanding vacuum-assisted filtrated h-BN film. (b) TEM image of the prepared h-BN nanosheets by drop coating the ball-milled h-BN solution on a carbon-coated copper grid. (c) HRTEM image of the h-BN nanosheets with five layers. (d) Laser patterned micro-pattern of an Australian map on a free-standing h-BN film.

    Fig. 1. (a) Photo of the freestanding vacuum-assisted filtrated h-BN film. (b) TEM image of the prepared h-BN nanosheets by drop coating the ball-milled h-BN solution on a carbon-coated copper grid. (c) HRTEM image of the h-BN nanosheets with five layers. (d) Laser patterned micro-pattern of an Australian map on a free-standing h-BN film.

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    (a) FTIR spectra of the pristine h-BN film (blue line) and laser irradiated h-BN film (red line). (b) Raman spectra with laser excitation at the wavelength of 532 nm of the pristine h-BN film (blue line) and laser irradiated h-BN film (red line). (c) Atomic structure of pristine h-BN film and localized oxidation area after laser irradiation (red dash area).

    Fig. 2. (a) FTIR spectra of the pristine h-BN film (blue line) and laser irradiated h-BN film (red line). (b) Raman spectra with laser excitation at the wavelength of 532 nm of the pristine h-BN film (blue line) and laser irradiated h-BN film (red line). (c) Atomic structure of pristine h-BN film and localized oxidation area after laser irradiation (red dash area).

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    (a) UV-VIS absorption characterization in the pristine h-BN film (blue line) and the laser patterned area (red line). (b) The refractive index (n0) of the pristine h-BN film (blue line) and laser patterned area (red line). (c) The extinction coefficient (ĸ) of the pristine h-BN film (blue line) and laser patterned area (red line).

    Fig. 3. (a) UV-VIS absorption characterization in the pristine h-BN film (blue line) and the laser patterned area (red line). (b) The refractive index (n0) of the pristine h-BN film (blue line) and laser patterned area (red line). (c) The extinction coefficient (ĸ) of the pristine h-BN film (blue line) and laser patterned area (red line).

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    (a) Open aperture Z-scan results before laser oxidation. (b) Close aperture Z-scan results before laser oxidation. (c) Open aperture Z-scan results after laser irradiated optical breakdown. (d) Close aperture Z-scan result after laser oxidation.

    Fig. 4. (a) Open aperture Z-scan results before laser oxidation. (b) Close aperture Z-scan results before laser oxidation. (c) Open aperture Z-scan results after laser irradiated optical breakdown. (d) Close aperture Z-scan result after laser oxidation.

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    (a) The measured nonlinear absorption coefficient β and (b) nonlinear refractive index n2 of the pristine h-BN film. (c) The measured nonlinear absorption coefficient β and (d) nonlinear refractive index n2 of the laser oxidized h-BN film.

    Fig. 5. (a) The measured nonlinear absorption coefficient β and (b) nonlinear refractive index n2 of the pristine h-BN film. (c) The measured nonlinear absorption coefficient β and (d) nonlinear refractive index n2 of the laser oxidized h-BN film.

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    FWM spectra of the h-BN film excited with pump wavelengths (865 nm, 1200 nm), compared to that of a standard gold film.

    Fig. 6. FWM spectra of the h-BN film excited with pump wavelengths (865 nm, 1200 nm), compared to that of a standard gold film.

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    • Table 1. The compared results of different kinds of h-BN with their nonlinear absorption coefficient β, nonlinear refractive index n2, the imaginary part Imχ(3) and the real part Reχ(3) and the effective third-order susceptibility |χ(3)| of complex third-order susceptibility χ(3).

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      Table 1. The compared results of different kinds of h-BN with their nonlinear absorption coefficient β, nonlinear refractive index n2, the imaginary part Imχ(3) and the real part Reχ(3) and the effective third-order susceptibility |χ(3)| of complex third-order susceptibility χ(3).

      Materialβ (cm/GW)n2 (cm2/GW)Im(χ(3)) (×10–12 esu)Re(χ(3)) (×10–9 esu)|χ(3)| (×10–9 esu)FoMReference
      Liquid exfoliated h-BN nanosheets74.841.2×10–13NANANANAref.23
      Monolayer CVD h-BN10410NANANANAref.24
      Chemical-weathering h-BN0.079NANANANANAref.50
      Free-standing h-BN (pristine)4.110.00864.1116.3816.3826.15Our work
      Free-standing h-BN (laser oxidized)6.710.16384.8511.8411.84305.14Our work
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    Jun Ren, Han Lin, Xiaorui Zheng, Weiwei Lei, Dan Liu, Tianling Ren, Pu Wang, Baohua Jia. Giant and light modifiable third-order optical nonlinearity in a free-standing h-BN film[J]. Opto-Electronic Science, 2022, 1(6): 210013

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    Paper Information

    Category: Research Articles

    Received: Nov. 17, 2021

    Accepted: Jan. 5, 2022

    Published Online: Jul. 29, 2022

    The Author Email:

    DOI:10.29026/oes.2022.210013

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology