Alexandr Sadovnikov <leos...@mail.ru> wrote: > And in this computational task one have to use > the relative permeability tensor (aka mu) and > the components of this tensor depend on the frequency. > And the main question is how can I do a material > with a the relative permeability tensor with the components > those depend on the frequency?
I'm not exactly sure what your question is, but let me assume that it is that you have some pre-specified frequency dependence for mu, but cannot see how this converts into the time-response models used by meep/fdtd. In this case, what you have to do is (a) assume the overall response of mu can be described by a weighted sum of (eg) lorentzian temporal responses (b) fit the total _spectral_ of those summed lorentzian responses to your pre-specified frequency dependence of mu by varying their resonance frequencies, losses, and weightings. (c) define the time-response of mu according to (a) and the fitted parameters from (b). A not entirely unrelated scheme is discussed in Amiranashvili et. al, Optics Communications, Vol. 283, 480-485 (2010). -- ---------------------------------+--------------------------------- Dr. Paul Kinsler Blackett Laboratory (Photonics) (ph) +44-20-759-47734 (fax) 47714 Imperial College London, dr.paul.kins...@physics.org SW7 2AZ, United Kingdom. http://www.qols.ph.ic.ac.uk/~kinsle/ _______________________________________________ meep-discuss mailing list meep-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
