Dielectric spectroscopy probes dynamic response of the bulk polarization of the material to a uniform electric field. A recent interest, advanced by Prof. Ranko Richert at ASU, is to understand dynamics and statistics of nonlinear dielectric response, i.e., dielectric polarization proportional to at least the third power of the external electric field. This research is currently in an early stage, one recent publication is listed below.     

• "Nonlinear dielectric response of polar liquids", D. V. Matyushov, J. Chem. Phys. 142, 244502 (2015)

Solutions:

Absorption of radiation and dielectric spectroscopy of solutions helps in understanding the polarization of solution interfaces. Theory is required for interpreting the laboratory data. We work on theories of THz absorption  and dielectric spectroscopy of  solutions (also of proteins in water).

• "Depolarized light scattering and dielectric response of a peptide dissolved in water", D. R. Martin, D. Fioretto, and D. V. Matyushov, J. Chem. Phys. 140, 035101 (2014)
• "On the theory of dielectric spectroscopy of protein solutions", D. V. Matyushov, J. Phys.: Condens. matter 24, 325105 (2012)
• "Terahertz absorption of dilute aqueous solutions", M. Heyden, D. J. Tobias, D. V. Matyushov, J. Chem. Phys. 137, 235103 (2012)