Scattering Cross Section - Comsol

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yacobito

Joined: 01 Nov 2009
Posts: 1
Location: Boston, MA

02 Nov 2009 17:19 Scattering Cross Section - Comsol

Hello All,

I am trying to find the best way to calculate the scattering cross section in COMSOL for a 2-D cylinder. I eventually will move to 3-D spheres and cylinders. What I have is a circle of 30 nm in radius and my circular PML layer drawn 10 Lambda away, where at this boundary (far field) I want to calculate the scattering cross section. I am doing all of this in the RF Module->In Plane Waves->TE Waves->Scattering Harmonic Propagation.

Scattering cross section to me seems to be defined differently depending on what text book you are looking at. The one I see most is:

Csca = (1/|Eincident|^2) Integral (|Escattered|^2) dr

So here are my more specific questions.

1. Would you take Eincident to be E0iz_rfweh or Ez?
2. Is scEZ the Escattered filed I am looking for or do I have to subtract out the incident field?

Any input on your experiences calculating scattering cross sections would be greatly appreciated.

Regards,
Jacob