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利用太赫兹(THz)时域光谱技术测量了CuS纳米粒子与聚乙烯粉末混合体系在THz波段的光谱响应,然后采用有效介质理论计算得出纯CuS纳米粒子在该波段的吸收系数、复介电常数和复电导率等光学常数,并且分别运用Lorentz色散理论和Durde-Smith模型对该材料的复介电常数和复电导率进行理论上的模拟计算,所得结果与实验符合很好,最后还得到了晶格振动频率、载流子散射时间等THz重要参数.研究结果对揭示CuS纳米结构的材料性能、物理效应和潜在应用等方面具有重要参考价值.
The spectral response of CuS nanoparticle mixed with polyethylene powder in THz band was measured by THz time-domain spectroscopy. Then the absorption coefficient of pure CuS nanoparticles in this band was calculated by effective medium theory. The complex dielectric Constant and complex conductivity and other optical constants, and the use of Lorentz dispersion theory and the Durde-Smith model of the material complex permittivity and complex conductivity theoretical simulation calculations, the results obtained in good agreement with the experiment, and finally get The parameters of THz, such as lattice vibration frequency and carrier scattering time, are important parameters.The results of the study have important reference value for revealing the material properties, physical effects and potential applications of CuS nanostructures.