Hi Daniel,
Check this post: http://www.mail-archive.com/meep-discuss@ab-initio.mit.edu/msg00161.html Best, Matt On Thu, 29 Nov 2007, Dani Infante wrote: > I have been using harminv to calculate the frequencies and Q factors of the > modes in a photonic crystal cavity and I have got strange negative values > for the quality factors of some of the modes. What does it mean? > > I also attach the obtained results: > harminv0:, frequency, imag. freq., Q, |amp|, amplitude, error > harminv0:, 0.223306537028419, 2.45087478374015e-4, *-455.564965027799*, > 0.324250754034816, 0.303479559920429+0.114187163037924i, 2.72315424282051e-6 > harminv0:, 0.231230124064845, -6.5060745323059e-4, 177.703254794172, > 4.73854011681368, -1.28125419198095-4.56203355250527i, 3.13943646554943e-6 > harminv0:, 0.237885260939232, 0.00101896725040082, *-116.728609700487*, > 1.41924201168144, 0.169824334481733+1.40904491877988i, 8.08320988300965e-7 > harminv0:, 0.2417314616631, 1.47763412528991e-5, *-8179.67917517036*, > 4.98580429145361, -4.88862325367867+0.979595383956763i, 2.63720368537054e-6 > harminv0:, 0.260846325835526, 1.47439956861405e-5, *-8845.84923206146*, > 1.1735991199864, 0.226993111365976-1.15143780632097i, 3.36001677162268e-6 > harminv0:, 0.271510447723058, -0.0020946770466663, 64.8096202121396, > 2.20957791725273, -1.4297893175926+1.68461778445705i, 1.67800656305732e-5 > > _______________________________________________ meep-discuss mailing list meep-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
