Accession Number : ADA138322

Title :   The Potential Dependence of Surface Plasmon-Enhanced Second Harmonic Generation at Thin Film Silver Electrodes.

Descriptive Note : Technical rept.,


Personal Author(s) : Corn,R M ; Romagnoli,M ; Levenson,M D ; Philpott,M R

PDF Url : ADA138322

Report Date : Nov 1983

Pagination or Media Count : 23

Abstract : The intensity of second harmonic light generated from plasmon surface polaritons at thin film silver electrodes in contact with an aqueous electrolyte exhibits a strong dependence on electrode potential for a variety of electrochemical systems. The surface plasmons enhance the electromagnetic field at the surface, thereby greatly increasing the second harmonic intensity at the interface. We have measured the potential dependence of surface plasmon-enhanced second harmonic generation at a silver electrode for aqueous solutions of sodium perchlorate, sodium thiocyanate, urea (a strong adsorbate), and for a buffered solution of lead acetate in the underpotential deposition region where a monolayer of lead is deposited onto the silver. The results can be interpreted by a simple theory relating the second harmonic signal to the static electric field at the surface; to the first order this field is proportional to the excess charge density on the metal. (Author)

Descriptors :   *Electrochemistry, *Electrodes, *Plasmons, *Light scattering, Harmonics, Surfaces, Silver, Thin films, Electrolytes, Electromagnetic fields, Intensity, Interfaces, Sodium compounds, Perchlorates, Thiocyanates, Urea, Adsorbates, Buffers(Chemistry), Lead compounds, Acetates, Electrostatic fields, Signals, Charge density

Subject Categories : Physical Chemistry
      Quantum Theory and Relativity

Distribution Statement : APPROVED FOR PUBLIC RELEASE