I have three layers of different complex refraction index. I am shining with a laser of wavelength lambda onto the layers.
Through etching, each layer is etched one by one, and hence one by one, the thickness is reduced of each layer until zero.
Experimentally, I am getting this intensity plot (the first and last layer have the same refraction index (blue line):
How can I obtain this with an analytic solution ? (or iterative process)
I am mostly interested in normal incidence !
The plot is just there for reference. It only shows the shape of the final solution. The y-Axis represents the light intensity. The x-Axis the time.
Blue: Line -> Light intensity
Yellow Line: It's second derivative