What is Ellipsometry?

Ellipsometry measures a change in polarization as light reflects or transmits from a material structure. The polarization change is represented as an amplitude ratio, Ψ, and the phase difference, Δ. The measured response depends on optical properties and thickness of individual materials. Thus, ellipsometry is primarily used to determine film thickness and optical constants. However, it is also applied to characterize composition, crystallinity, roughness, doping concentration, and other material properties associated with a change in optical response.

Please read the tutorial written by J.A.Woollam:

https://www.jawoollam.com/resources/ellipsometry-tutorial/what-is-ellipsometry

The equipment in MCPF is alpha-SE Ellipsometer, please visit its website at:

https://www.jawoollam.com/products/alpha-se-ellipsometer