Hi, all, I received a few questions about the definition of material dispersion of gold. So I'm posting the answer here.
I found that the material dispersion of gold in the range of near UV to visible light is not well reproduced by the simple Drude model, as in the attached plots. The references for the plots are, Johnsn&Christy Phys. Rev. B., 6, 4370 (1972) Etchegoin, et al. J. Chem. Phys., 125, 164705 (2006) Chen&Lynch Phys. Rev. B., 36, 1425 (1987) Maier et al. Phys. Rev. B., 67, 205402 (2003) Vial et al. Phys. Rev. B., 71, 085416 (2005) The definition by Etchegoin et al. seems to be the best, but was difficult to use in Meep. Therefore, I used the definition by Vial et al. The values in the original paper were converted to match my definition of spacial unit. As I'm not familiar to this field of science, there can be some mistakes.:-) Regards, > hi! > > > > I try to use meep to calulate dispersive material such as gold, but I don't > know how to get the values of omega, gamma and delta-epsilon. I see a series > of omega, gamma and delta-epsilon for gold in your discussion letter. > > Could you please tell me how to get them in detail? > > > > Thank you in advance! > > > > sincerely, > > Liu > > > -- ----------------------------------------------------------- Masatoshi Tosaka (e-mail: [EMAIL PROTECTED]) Lab. of Polymer Controlled Synthesis Institute for Chemical Research, Kyoto University -----------------------------------------------------------
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