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Photonics – Chinese

Photonics – Chinese

Topics related to Lumerical and more, in Chinese language.

请问FDTD可以导入负介电常数和负磁导率的材料吗?

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    • zjh
      Subscriber
    • Guilin Sun
      Ansys Employee

      不可以直接导入,必须使用Magnetic Electric Lorentz 模型,https://optics.ansys.com/hc/en-us/articles/360034394734-Advanced-and-custom-optical-material-models-in-FDTD-and-MODE

      例子参见 Bulk metamaterials based on magnetic and electric Lorentz models

      你需要根据已有波长的数据推断其它参数。万一数据点少,应该把谐振波长安排在仿真波段之外;如果数据点多,你可能需要某种优化获取相关材料参数。需要试验,以得到所需要的物理现象为准。

       

      • zjh
        Subscriber

        好的 谢谢老师回复!还想请问一下,如果想设置折射率虚部为负数的材料的话,可以直接用n,k材料设置吗?试了一下好像容易导致仿真发散

    • Guilin Sun
      Ansys Employee

      不可以用n,k材料,必须用介电常数和磁导率同时使用。

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