银-氧化铯薄膜中银量对光学特性的影响

INFLUENCE OF Ag CONTENT ON OPTICAL PROPERTIES OF Ag-Cs_2O THIN FILMS

本文讨论了激活良好的氧化铯膜中逐次加入银后在可见光和近红外范围内玻璃基底一侧和真空一侧的反射率R_f,R和透射率T的变化,发现R随银量增加而增加,而R_f随银量的增加先是变小而后增大。薄膜的光吸收和银粒的光吸收随银量的增加而增加,它的光电发射随银量的增加先是上升而后下降。本文提出银粒分布不均匀的模型可以对这些现象进行解释。

The variations of glass refletance or front reflectance R_f, vacuum reflectance R_v and tran-smittance T of well activated cesium oxide thin films with Ag addition were measured within the visible and infrared range. R_v increases as the amount of Ag increases, but R_f decreases at first, then increases. Optical absorptions of the thin film and silver particles increase as the amount of Ag increases, and its photoemission increases at first, and then decreases. A model with inhomogeneous distribution of silver particles is proposed.