Thank you, Benjamin, I had hoped it might be possible to simply specify a complex permittivity: eps_r = n^2 - k^2 eps_i = 2*n*r But I didn't see a facility for assigning complex numbers to material values. Patti
Benjamin M. Schwartz wrote: > PattiMichelle wrote: > >> Is there a preferred way to specify the complex index of refraction of a >> lossy conductor (for instance, carbon)? >> > > The index of refraction of a material is only well-defined at a single > frequency. Meep works at all frequencies; therefore, the index of refraction > must be implemented in a frequency-dependent manner. Specifically, it is > implemented as a polarization field. See > http://ab-initio.mit.edu/wiki/index.php/Dielectric_materials_in_Meep > > Typically, the complex index of refraction is defined in terms of real > permittivity (epsilon) and conductivity (sigma) at a specific angular > frequency > (omega). If this is your case, you may want to see this message: > http://ab-initio.mit.edu/pipermail/meep-discuss/2007-October/001179.html > > and this ctl file: > http://ab-initio.mit.edu/pipermail/meep-discuss/attachments/20071014/7a96a95c/attachment.txt > > --Ben Schwartz > > >
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