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transient solver problem in cst 2008

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happytgt

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I simulate the structure of gold nano aperture at specific frequency
(frequency of 474THz, wavelength of 633nm)

When I simulate this structure, I use epsilon value of -9.514 and tangent

delta electric of 0.128.
(In other words, epsilon = -9.514-i*1.218)

There is no problem when I simulate the structure with Frequency domain solver.

But When I simulate this structure with Transient domain solver in order to verify

some results from frequency domain solver, Error was occured like this.


(X) The transient solver does not support negative epsilon or mue values.
Please define dispersive materials instead.


In cst, Transient solver doesn't simulate metal structure at visible wavelength?

(because some metal has a negative epsilon for visible light)

plz help me, sir... I want to verify my results from frequency domain solver

T_T
 

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