Size Effect on the Width of Plasma Resonance Absorption of Silver Island Films

概要

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The size dependence of the half width of the optical plasma resonance absorption ofsilver island films has been investigated at 293 K. Below a diameter of about 14 A thedeviation from the classical prediction was observed. Considering the average energylevel spacing and the level broadening due to scatterings, this deviation was attributedto the quantum size-effect. The level broadening e:;timated from electron-electronscattering in the optical region was of the order of the average energy level spacing ofthe particle of about 20 A in diameter. Furthermore, the half width was not changedfrom 293 to 85 K, which agrees with the prediction based on the temperaturedependence of this scattering. Therefore, it was concluded thxt the conduction band iscontinuous down to diameters of about 20 A because of the level broadening due toelectron-electron scattering.
社団法人日本物理学会の論文
1982-04-15