Dear Steven and other meep users, We want to use the doping silion in our simlution. We describe doping silion by drude mode and get negative omega_p.^2 and positive gamma, so the gamma is positive and delta-epsilon is negative in meep. However, harminv can't give any result. We change omega_p.^2 and gamma so that we get negative gamma and positive delta-epsilon in meep, whereas this model is not accurate(but the model is accurate at a specific wavelength which is our interested). Harminv give some results. My question is can we set the epsilon in this way? I am not sure this method is right, because the source is a pulse which contains much frequency signals and the material responses all frequency signals. Thank you in advance. Li
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