Hej ! No, from what I understand, you do not need to define a as a parameter. Just remember that you want to use your base length as 1mu, so as an example, when you use things such as
(make lattice (size 16 8 no-size)) you mean each value in microns. It's up to you to do the conversions for wavelength (in microns too) and frequency. Best regards, Nicolas On Mar 25, 2013, at 8:04 AM, 张晓云 wrote: Dear meep users, I have a stupid question about the unit in meep. From the previous mails, I learned that "Length is specified as the "number of" 'a' units where 'a' is your length-scale, usually a wavelength." My question is how can I define "a". I want to set "a=1µm". Is the following sentence right? (define-param a 1e-6) Thanks for your help. Best regard. _______________________________________________ meep-discuss mailing list [email protected]<mailto:[email protected]> http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss _______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
