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Question Real and Imaginary Parts of the index of Refraction. 

Forum: Processes Involving Optical Photons
Date: 18 Mar, 2009
From: <jdswado@gatech.edu>

Hello all,

In my model I'm trying to included the index of refraction for aluminum, but this of course has both real and imaginary parts to it.

I currently have this:

    G4double RefractiveIndex3[nEntries] =
            { 0.444, 0.467, 0.49, 0.5156, 0.5412, 0.5668, 0.5924,
              0.618, 0.6482, 0.6784, 0.7086, 0.7388, 0.769, 0.8068,
              0.8446, 0.8824, 0.9202, 0.958, 1.0064, 1.0548, 1.1032,
              1.1516, 1.2, 1.263, 1.326, 1.389, 1.452, 1.515,
              1.578, 1.641, 1.704, 1.767, 1.83, 1.927, 2.024,
	          2.121, 2.218, 2.315};

Which are the real portions of the refractive index for aluminum.

In the Developer's Guide I found this:

"The reflectivity off a metal surface can also be calculated by way of a complex index of refraction. Instead of storing the REFLECTIVITY directly, the user stores the real part (REALRINDEX) and the imaginary part (IMAGINARYRINDEX) as a function of photon energy separately in the G4MaterialPropertyTable. Geant4 then calculates the reflectivity depending on the incident angle, photon energy, degree of TE and TM polarization, and this complex refractive index."

I see that they must be entered seperately, but how would I write this?

Thanks!

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1 Feedback: Re: Real and Imaginary Parts of the index of Refraction.   (Gumplinger Peter - 18 Mar, 2009)
(_ None: Re: Real and Imaginary Parts of the index of Refraction.   (Daniel Bonifacio - 20 Mar, 2009)
(_ Warning: Re: Real and Imaginary Parts of the index of Refraction.   (Gumplinger Peter - 20 Mar, 2009)
(_ Ok: Re: Real and Imaginary Parts of the index of Refraction.   (jdswado@gatech.edu - 22 Mar, 2009)
(_ Question: Re: Real and Imaginary Parts of the index of Refraction.   (Daniel Bonifacio - 23 Mar, 2009)
(_ Warning: Re: Real and Imaginary Parts of the index of Refraction.   (Gumplinger Peter - 23 Mar, 2009)
1 Ok: Re: Real and Imaginary Parts of the index of Refraction.   (Daniel Bonifacio - 25 Mar, 2009)
2 Question: Re: Real and Imaginary Parts of the index of Refraction.   (jdswado@gatech.edu - 07 Aug, 2009)
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