Learning outcomes of the course unit
Present the various spectroscopic techniques in a unified conceptual picture. Give general physical fundamentals, give some simple concrete examples, and show some interesting state-of-the-art applications.
Course contents summary
Space-time scales; structure and dynamics of physical systems. Brief introduction to the formalism of stochastic processes and the associated statistical mechanics. Correlation functions and response functions. Wiener-Khintchin theorem. Examples of correlation functions that are measured with various spectroscopic techniques. Light scattering: Rayleigh, quasi-elastic and Brillouin scattering. Inelastic light scattering: Raman spectroscopy; phenomenology, experimental techniques, theoretical foundations, some applications. Absorption and fluorescence spectroscopy: phenomenology, experimental techniques, effect of electron-vibration interaction on the optical properties of materials. Neutron spectroscopy: introduction, phenomenology, theoretical foundations, experimental techniques regarding diffraction, small angles, inelastic and quasi-elastic scattering. Application to the study of diffusive motions on a microscopic scale in water, aqueous solutions, complex molecular systems.
Lectures, exercises, period of laboratory training; oral exam.