Thin film computed. Anti-reflective coatings. With code

Описание: TYPO: k_i=2 \pi n_i/\lambda!!!
To calculate the Electric field in a thin film, one must take into account that the wave reflects back and forth at each interface an infinite number of times and use Fresnel coefficients. Here, we sum these series.
You will find the results for the transmission and reflection coefficients, as well as the MATLAB codes, at the link below.

https://github.com/kuyzirf/thin_film

See also:
https://torrscientific.co.uk/anti-ref...
Orfanidis, Sophocles J. Electromagnetic Waves and Antennas.

I thank Anna    / @annbeautycult   for some computations.

00:00 Intro
00:17 Describing three-layered system
00:36 Fresnel reflection and transmission
00:56 Electric field in every layer
1:21 Finding reflection coefficient
2:40 Fields inside the film
3:42 Transmission
4:20 Intensity
4:37 Example of optical coating
4:48 Short interruption
5:04 Condition for zero reflection
6:22 Examples and coding