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TiO2 Absorption Spectra
Posted 5 févr. 2014, 07:23 UTC−5 RF & Microwave Engineering, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 4.3b 2 Replies
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I am studying the plasmonic effects of gold nanoparticles on a substrate (TiO2) and have successfully used the Scatterer on Substrate model to do this. I am able to produce an absorption spectrum with the nanoparticle present however I also want to be able to compare this spectra with one without the nanoparticle. I tried using the same technique whereby I create a volume within the substrate (100x100x20nm), set up a integration over this volume, and then used the formula:
Integration_volume(emw.Qh)/Power_In
The results I get from this however are tiny e-33 and fluctutate around zero even within UV regions where I would have expected some absorption by the TiO2. Has anyone had experience in doing this and can tell me where I am going wrong?
Many Thanks,
Josh
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I believe that the oscillator producing absorption is the nanoparticle. In the as supplied model there is no absorption in the substrate. So when you remove the nanoparticle you should see zero absorption, or e-33 as you did. You could look up an absorption spectra and put it into the model, then run it again with and without the nanoparticle.
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Thanks