I have the transmission measurement of ZnO thin film, I'm looking for a software or equation to get the thickness and the refraction index.
I guess this paper might give you desired solution:
http://semiconductorslab.com/pdfs/MatSciPoland%20%28Determination%20of%20the%20thickness%20and%20optical%20constants%20of%20transparent%20indium-doped%20ZnO%20thin%20films%20by%20the%20envelope%20method%29.pdf
I guess this paper might give you desired solution:
http://semiconductorslab.com/pdfs/MatSciPoland%20%28Determination%20of%20the%20thickness%20and%20optical%20constants%20of%20transparent%20indium-doped%20ZnO%20thin%20films%20by%20the%20envelope%20method%29.pdf
This webapplet might be all you need:
https://www.filmetrics.com/reflectance-calculator
We are close to releasing a thin-film solver for plasmonic assays, and could probably run this computiiton for you, if the above applet isn't sufficient. Here's what we'd need:
Do you have a preferred dataset/model for the refractive index as a function of wavelength for ZnO? If not, we have a couple built in to the databases our program is using.
So is the system basically glass/ZnO/air that you're transmitting through? Or glass/ZnO/water?
How thick is the ZnO?
Dear Adam Hughes
ZnO is not there in your webapplet. Any suggestions in this regard??
Thank you so much for your answers Mr Shahikant And Mr Hughes.
@Mr Adam Hughes, My sample is FTO/ZnO/Air (FTO is used here as a substrat (F:SnO2)) ,which i didn't found in your database. ? Actually I don't know the thickness of my film, but I can't estimate that it, From SEM image, it can be around 700nm.
To do the calculation you need to know the thickness of your layers and the index of refraction as a function of wavelength for each material. Air, water, glass etc... are basically known or can be modeled as constants or with the sellmeir model in terms of how their index of refraction varies with wavelength. But without an estimation for the index of refration of ZnO and FTO, you can't do the calculation. If you can find some values from a paper, that's a start. The program I'm releasing has access to two major free materials databases. These are the Sopra dataset:
http://www.sspectra.com/sopra.html
And the refractive index info optics RIINFO database
http://refractiveindex.info/
(Although, due to how the RIInfo database encodes their materials, we don't yet support decoding of all materials... coming soon)
Or if you find the data elsewhere, if you can get it as a file formatted like:
Wavelength N K
300 1.440 0.31
301 1.441 0.31
etc...
IE delimited values of wavelength, real, and imaginary index of refraction, we can import that.
That calculation can't be done unless you have data, or at least an estimate, for the index of refraction (both real and imaginary components if they are metals) of the materials of interest. Let me know if you find anything promising in those.
Hey guys, I'm sorry. I mixed up this question with another and I'm trying to help you compute transmission given that you know d and n of the material. You want to estimate d and n, given T. SORRY!
In this case, you want to use the Envelope Method (as far as I know), but I can't help with the computation unfortunately.
You can use Envelope method for determining thickness and the refraction index of the films. You can find information about this method attached files.
I think I have the same problem ,where I need database for the refractive index as a function of wavelength for ZnO from (200-1000 nm),please if any help or suggestions
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