Reflection and Transmission

In this chapter we study how a material reflects and transmits a light beam in terms of the macroscopic effective dielectric coefficient of the material. The focus of the chapter is to extract the effective dielectric coefficient of the material using the harmonic oscillator model and the Kramers–Kronig relationship by properly designing the reflection and transmission spectroscopic measurements including the reflection and transmission spectra from and through a thin film and the reflection spectrum from a thin film on a substrate.