Electric-field induced second-harmonic generation
Revision as of 16:21, 4 January 2010 by Cmditradmin (talk | contribs) (New page: === Overview === Electric-field induced second-harmonic generation (EFISH) is a technique to measure the molecular first hyperpolarizability of EO molecules. A strong electr field is use...)
Overview
Electric-field induced second-harmonic generation (EFISH) is a technique to measure the molecular first hyperpolarizability of EO molecules. A strong electr field is used to induce acentric order in a solution of molecules. This results in the product of the the dipole moment μ and β. It measures only the component of β along the dopole moment axis.
This is a useful figure of merit for poled polymer systems but is inappropriate for ionic and non-dipolar chromophores.