Optical Reflectance and Electrical Resistance of Gus Adsorbed Thin Metallic Films

概要

論文の詳細を見る
Effects of chemisorption on the visible and near infrared lights reflected from evaporated Ag films are studied on the basis of the Maxwell equations. To calculate the surface electric current generated by the electric field of the incident electromagnetic wave, Fuchs' form of the specularity parameter derived by Greene is evaluated from the scattering probabilities of the conduction electrons at the surface. The specularity parameter determines also the electrical resistance of the films. The metal surface is approximated by the jellium model with a step surface potential barrier. Scattering potentials of neutral adatoms are assumed to be V(r)=-z*e^2/r exp (-2r/r_o), where z* and r_o are determined by Slater's rule. It is found that O, N and C chemisorbed on Ag films of 200 A thickness produce a decrease in the reflectance by a relative amount 〓R_f/R_f=2-3x10-~4 for the coverage, 0.4x10~15 atoms/cm^2, and produce an increase in the resistance of the films by a relative amount 〓R/R=1.8-3.0x10~2.
社団法人応用物理学会の論文
1979-01-05