Re: [Meep-discuss] Units for polarizability components
On Fri, 18 Jan 2008, Manoj Rajagopalan wrote: >Meep's polarizabilities are specified using omega, gamma, > delta-epsilon, sigma etc. Should the gamma be specified in units of c/a > or 2PI*c/a? 2*pi*c/a, the same as omega. This way you can just take the dispersion formula in: http://ab-initio.mit.edu/wiki/index.php/Dielectric_materials_in_Meep#Material_dispersion and plug in your frequency and other parameters in Meep units and it will give you the right value of epsilon. Steven ___ meep-discuss mailing list meep-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
[Meep-discuss] Units for polarizability components
Hi all, Meep's polarizabilities are specified using omega, gamma, delta-epsilon, sigma etc. Should the gamma be specified in units of c/a or 2PI*c/a? This doubt stems from the Johnson and Christy paper on optical constants for noble metals where gamma is specified as 1/tau where tau is the relaxation time. By this token gamma is just a frequency. But because it appears in an expression involving sums and products of angular frequencies, the question is if Meep treats gamma to be an angular frequency and applies the factor of 2PI internally as with normal angular frequencies. Thanks Manoj ___ meep-discuss mailing list meep-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
