I want to calculate the thickness of a thin film deposited on glass with the transmittance using the Swanpoel method:
I use the transmittance spectrum of the sample (film + glass) or the T/T0 ratio ( T is the transmittance of (film+ glass) and T0 is the transmittance of the glass).
Sarada K Gopinathan
Obtain Transmittance Spectra: Measure the transmittance spectrum of the film on glass (T) and the transmittance spectrum of the bare glass (T₀). Calculate T/T₀ Ratio: Compute the ratio of the transmittance of the film on glass to the transmittance of the bare glass for each wavelength. Identify Interference Maxima: Identify the wavelengths where the transmittance shows interference maxima (peaks). Determine Optical Path Difference (OPD): Calculate the optical path difference (OPD) for each interference maximum using the formula:
To calculate the thickness of a thin film using the Swanepoel method, follow these steps:
OPD=2ndcos(θ)
where n is the refractive index of the film, d is the film thickness, and θ is the angle of incidence
5. Calculate Thickness: Use the OPD and the corresponding wavelength to calculate the film thickness dd using the formula:
d=OPD/2n
You can find the thin film thickness from cross-sectional FE-SEM imaging.
0 votes
0 thanks
- Badges
- Science topic
- Similar topics
- Chemistry, Organic
- Organic
More Mourad Azibi's questions See All
Similar questions and discussions