Absorption spectra of tiny gold and silver objects

LUCÍA B. SCAFFARDI; JORGE O. TOCHO

Segovia, Spain

Congreso; 16th International Conference on Dynamical Processes in Excited States of solids (dpc 07); 2007

Ministerio de Ciencia y Técnica de España

Optical properties of very small metallic objects are discussed. Extinction spectra in the visible and near IR are performed for sizing tiny metallic objets. Both free and bound electrons contributions to dielectric function and its dependence with size are considered to explain the experimental results. Calculations for structured objects like core-coat spherical particles and bimetallic alloys are discussed and compared with recent experimental results.