Dear MEEP users,                I am trying to calculate the near field 
enhancement of a gold nanosphere. At the moment i only calculated the 
enhancement at a fixed wavelength using a continuous source. Now i want to 
calculate the enhancement at a broadband wavelength. I don't know about the 
next steps after hitting a sphere with a broadband pulse. How should i know 
that which value of the enhancement corresponds to which wavelength?I also read 
on the group that i should take a 4D Fourier transform. Can somebody tell me 
how should i perform a 4D Fourier transform?
Thanks in advance.
BR,Aaron                                          
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