I know absorption spectrum of my material and power of the incoming light (both vs. wavelength). Is there any model/equations which can be used to predict the temperature change using these known values?
Dear Farsad Imtiaz Chowdhury.
Your question is very abstract. Can you give some details about your object and spectra?
Dear Joseph Dubrovkin, I have done some preliminary simulation. My object is Au thin film which has a thickness of around 200 nm. Incoming light source has a wavelength range between 300-1000 nm and from here I got the absorption of Au thin films (from simulation). Now before I do some fabrication, I am trying to estimate the change of temp. in Au films due to this light absorption. I have a set up to measure my samples after fabrication which has a light source and I know the power of that source over this wavelength range. Hope its a bit clearer.
1. I suppose that your film in on the transparent matrix and you measure its absorption spectrum. The energy which your sample absorbs can be measured from the spectrum.The small changes of temperature of the sample is proportional (?) to the area of the spectrum. But you need calibration. I do not know additional measurement parameter of the film which can be indicator of its temperature. Maybe resistance (???).
2. You may measure the absorption of the same film many times and check if the area is changed due to the temperature changes of the film (if any due to the heating).
Dear Joseph Dubrovkin, thanks for your suggestion.
Is it possible to theoretically calculate this value? I was hoping to get an idea about the possible temp increase before I proceed to fabrication. Thanks.
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