• Chinese Journal of Lasers
  • Vol. 48, Issue 12, 1203002 (2021)
Mingyang Wei, Jie Lian*, Qingfen Jiang, Yu Zhang, Chenlin Wang, Yueming Wang, and Zhen Xu
Author Affiliations
  • School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao, Shandong 266235, China
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    DOI: 10.3788/CJL202148.1203002 Cite this Article Set citation alerts
    Mingyang Wei, Jie Lian, Qingfen Jiang, Yu Zhang, Chenlin Wang, Yueming Wang, Zhen Xu. Ellipsometry Study on Optical Properties of Two-Dimensional Platinum Selenide Film[J]. Chinese Journal of Lasers, 2021, 48(12): 1203002 Copy Citation Text show less
    Schematic of three-zone CVD method
    Fig. 1. Schematic of three-zone CVD method
    Surface morphology analysis of PtSe2. (a) Optical photographs of the substrate and 2, 4, and 6 layers of PtSe2; (b) micrograph of 4L PtSe2 with a magnification of 100×; (c) AFM image of 4L PtSe2 with the scratch method showing the sample thickness of 2.2nm
    Fig. 2. Surface morphology analysis of PtSe2. (a) Optical photographs of the substrate and 2, 4, and 6 layers of PtSe2; (b) micrograph of 4L PtSe2 with a magnification of 100×; (c) AFM image of 4L PtSe2 with the scratch method showing the sample thickness of 2.2nm
    Raman spectral analysis of PtSe2. (a) Raman spectra of 2, 4, and 6 layers of PtSe2; (b) variation of the peak positions of Eg and A1g peaks with the number of layers
    Fig. 3. Raman spectral analysis of PtSe2. (a) Raman spectra of 2, 4, and 6 layers of PtSe2; (b) variation of the peak positions of Eg and A1g peaks with the number of layers
    Analysis of the transmission spectra of PtSe2. (a) Transmission spectra; (b) Tauc plots, the lines are the optical bandgaps estimated by the intercept method
    Fig. 4. Analysis of the transmission spectra of PtSe2. (a) Transmission spectra; (b) Tauc plots, the lines are the optical bandgaps estimated by the intercept method
    Test and fitting results of ellipsometric parameters for PtSe2 films with different layers. (a) Test and fitting results of ψ; (b) test and fitting results of Δ
    Fig. 5. Test and fitting results of ellipsometric parameters for PtSe2 films with different layers. (a) Test and fitting results of ψ; (b) test and fitting results of Δ
    Optical constants of PtSe2 films with different layers. (a) Refractive index; (b) extinction coefficient; (c) real part of the dielectric function; (d) imaginary part of the dielectric function
    Fig. 6. Optical constants of PtSe2 films with different layers. (a) Refractive index; (b) extinction coefficient; (c) real part of the dielectric function; (d) imaginary part of the dielectric function
    Temperature-dependent optical constants of PtSe2 films. (a) (c) Refractive index and extinction coefficient of 4L PtSe2; (b) (d) refractive index and extinction coefficient of 6L PtSe2
    Fig. 7. Temperature-dependent optical constants of PtSe2 films. (a) (c) Refractive index and extinction coefficient of 4L PtSe2; (b) (d) refractive index and extinction coefficient of 6L PtSe2
    The thermo-optical coefficient of PtSe2 films as a function of wavelength
    Fig. 8. The thermo-optical coefficient of PtSe2 films as a function of wavelength
    SampleTauc-Lorentz oscillatorA/eVC/eVEn0/eVEb/eVε
    2L112.201.1442.2000.0100.372
    2116.401.7872.5972.0080
    316.706.1948.90500
    4L137.921.3121.9240.6820.083
    212.422.2093.09700
    35.252.4635.0370.5210
    6L140.581.3593.1100.7530.544
    212.932.4493.11000
    36.992.0724.9481.7900
    Table 1. The optimum fitting parameters of Tauc-Lorentz oscillators
    Mingyang Wei, Jie Lian, Qingfen Jiang, Yu Zhang, Chenlin Wang, Yueming Wang, Zhen Xu. Ellipsometry Study on Optical Properties of Two-Dimensional Platinum Selenide Film[J]. Chinese Journal of Lasers, 2021, 48(12): 1203002
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