三维有限差分时域方法的代码。可以计算电介质，色散介质（drude 模型）等的光学响应。三维光子晶体结构的能带等。-Code domain finite difference method when. You can calculate the dielectric dispersion medium (drude model) and other optical response. And other three-dimensional photonic band crystal structu

计算掺杂硅的介电常数，drude model-epsilon of doped si

这是用以计算石墨烯的电荷密度，基于的是drude modle。(graphene_sig based on MATLAB)

计算金属的介电常数,，准确的说是Drude-Lorenz模型(It can be used to calculating the permittivity of metal)