Accession Number : ADA189519

Title :   Photochemistry at Structured Surfaces: A Classical Electromagnetic Approach.

Descriptive Note : Technical rept.,

Corporate Author : STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY

Personal Author(s) : Jelski, Daniel A ; Leung, P T ; George, Thomas F

PDF Url : ADA189519

Report Date : Feb 1988

Pagination or Media Count : 68

Abstract : This review article discusses several important aspects of photochemistry at structured metallic surfaces. The electromagnetic field above the surface is calculated using the Rayleigh expansion. Conditions under which this expansion is valid and simplifying approximations which make it easier to use are discussed in detail. This formalism is then applied to three different but related phenomena. First, the photodissociation rate of a molecule above a surface is calculated for laser frequencies at or near the surface plasmon resonance. It is found that there is an optimal molecule-surface distance for photodissociation. Then the absorption lineshape of a molecule is considered, where both Fano and Lorentzian lineshapes are found to be distorted as the molecule approaches the surface. Finally, laser-induced periodic deposition is discussed, and a model is developed to describe the growth rate of a cadmium grating.

Descriptors :   *ELECTROMAGNETISM, *PHOTOCHEMICAL REACTIONS, *PHOTODISSOCIATION, *SURFACE CHEMISTRY, ABSORPTION, CADMIUM, DEPOSITION, ELECTROMAGNETIC FIELDS, GRATINGS(SPECTRA), LASERS, METALS, PLASMONS, ELECTROMAGNETIC FIELDS, MOLECULE MOLECULE INTERACTIONS, SURFACE ROUGHNESS, VAPOR DEPOSITION

Subject Categories : Radiation and Nuclear Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE