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 Data Fitting using Drude model		  New Topic  Reply to Topic
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shahzad

USA
1 Posts
Posted - 05/24/2012 :  11:31:48 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
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I have experimental data graph in orgin for optical constants and want to do Drude Model fitting to calculate plasma frequency and relaxation time using equations of Drude model for real and imaginary part. How to do this Drude fitting in origin? Any help will be appreciated?

monas shahzad

easwar

USA
1964 Posts
Posted - 05/29/2012 :  2:25:57 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

Presumably you have two sets of data for real and imaginary part and want to fit them? What are the equations for fitting the real and imaginary part? Are there parameters that need to be shared between the two by fitting simultaneously?

Easwar
OriginLab
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goldfronts1

4 Posts
Posted - 10/07/2012 :  12:56:22 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
anyone can help with this question: thanks as i need to do this as well. here are the fitting equations


for the real part:

epsilon_real= epsilon_inter - (omega_p)^2/(omega^2+gamma^2 )



for the imaginary part:

epsilon_imaginary = ((omega_p)^2 * gamma)/(omega^3 + omega * (gamma)^2 )


the changing parameters are omega_p , gamma and epsilon_inter where epsilon_inter can be taken to be 1 to simplify the solving.
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cc261

22 Posts
Posted - 10/07/2012 :  11:07:26 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
if you put your data here i may help you.
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