The nonlinear optical technique of second harmonic generation has been used as an in situ probe of surface structure and symmetry at the electrode-electrolyte interface. Rotational anisotropy in the second harmonic (SH) signalprovides valuable information on the degree of structural order at the metal surface. For Ag(111), the observed patterns in the p-and s-polarized SH output agree with current theories and demonstrate that an ordered surface is present. These patterns change as the electrode is electrochemically roughened.
© 1987 Optical Society of America
Victoria L. Shannon, Daniel A. Koos, and Geraldine L. Richmond, "Second harmonic generation for in situ analysis of electrode surface structure," Appl. Opt. 26, 3579-3583 (1987)