The Drude-Lorentz model is required to measure the dielectric constant of a metal surface for different frequencies. I cannot insert the Drude-Lorenz model formula to COMSOL as a parameter. I need to know the way to include an imaginary number for COMSOL simulations.
plz, check this link below.
https://www.comsol.com/forum/thread/18938/using-the-imaginary-number
It is possible to input indexes in text files by interpolation function (n and k separately as function of wavelength or frequency). From there, you can input the Drude Lorentz model either in variables or even in material parameters. Please refer the comsol blog discussion as below for more details:
https://www.comsol.com/blogs/modeling-of-materials-in-wave-electromagnetics-problems/
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