Optical Properties of Ag and Cu

摘要: Experimental data for the optical constants of Ag and Cu extending to 25 eV are discussed in terms three fundamental physical processes: (1) free-electron effects, (2) interband transitions, (3) collective oscillations. Dispersion theory is used obtain an accurate estimate average mass characterizing behavior over entire energy range below onset transitions. The values ${m}_{a}=1.03\ifmmode\pm\else\textpm\fi{}0.06$ 1.42\ifmmode\pm\else\textpm\fi{}0.05 Cu. transitions 11 identified tentatively using Segall's band calculations. Plasma resonances involving both conduction $d$ electrons described physically.