Refractive Index & k

Filmetrics systems measure refractive index and extinction coefficient over wavelengths as wide as 200-1700 nm - in seconds and with a single mouse click. In many cases our accuracy is even better than much more complicated and expensive ellipsometry methods, especially when the film is absorbing and on a transparent substrate, which is often the case for Si3N4, ITO, and many other common materials.

Filmetrics also provides refractive index measurements as a service, or, if you just want to look something up, check out our refractive index database.