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Drude-lorentz dispersion model disparities
Posted 12 gen 2022, 07:41 GMT-5 Wave Optics, Materials, Parameters, Variables, & Functions Version 5.6 0 Replies
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Hi, I'm working on a model for calculating optical cross sections and have run into a weird result. As a beginning test I have based the model on the "Optical Scattering off a Gold Nanosphere" - model found in the application library with slight adjustment so that the diameter is 100 nm.
I have done two different dispersion models of the gold sphere. The first is using refractive index values from the built-in "Rakić et al lorentz-drude model" (application library model uses Brendel-Bormann).
The second was using a seperate electric wave equation for the sphere domain with the lorentz-drude values from the Rakić et al(1998) paper entered in the comsol model (converted to proper units).
The first result is in accordance with Mie-theory while the one using comsol's Drude-Lorentz dispersion model has a unexpected redshift. (see figures)
Can anyone help me shed some light at what might've caused this?
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Hello Ørjan Halvorsen
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