Reflectivity of adsorbate layers
Organic dye molecules absorb light in the visible spectral range. In the experiment, they are often deposited on weakly interacting metal surfaces (e.g., to simultaneously examine their electrons using a scanning tunneling microscope). However, the metal reflects light, so that the absorption is disturbed by the molecule - or the adsorbed molecules interfere with the perfect reflectivity of the metal.
In the proposed topic, the optical properties of the metal-adsorbate complex should be investigated by means of electrodynamics. In this case, suitable dielectric constants are assigned to the metal and the adsorbate layer, from which the reflectivity (and all other optical properties) can be calculated using Maxwell equations and boundary conditions.