Optical properties of aggregated lithium deposits
Optical properties of aggregated lithium deposits
复制标题
聚集锂沉积物的光学性质
DOI：
10.1364/josa.67.000510
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发表时间：
1977
期刊：
影响因子：
--
通讯作者：
G. Rasigni
中科院分区：
文献类型：
--
作者：
M. Rasigni;G. Rasigni
本文研究了在静态和动态真空下制备的聚集态锂沉积物在1-6 eV光谱范围内垂直入射时的反射率和透射率。这些沉积物的结构是使用碳膜复制技术原位确定的。结果表明，光学电导率在可见光和红外范围内表现出峰值，这是由于导电电子的等离子体共振。在紫外波段，由于带间跃迁，电导率上升。粒度直方图显示，矿床由轴对称椭球体组成。因此，Maxwell-Garnett理论不适合描述颗粒状锂沉积物的光学性质。一个广义的麦克斯韦-加内特理论的椭球粒子，其中考虑到粒子之间的相互作用，使用。实验结果与理论计算结果吻合较好。
Reflectance and transmittance of aggregated lithium deposits, prepared under static and dynamic ultrahigh vacuum, have been studied at normal incidence in the spectral range 1–6 eV. The structure of these deposits was determined in situ using a carbon film replication technique. It is shown that the optical conductivity exhibits peaks in the visible and infrared ranges, which are due to plasma resonance of the conduction electrons. In the uv range, the conductivity rises due to interband transitions. The particle size histograms show that deposits are made up of axially symmetrical ellipsoids. It follows that Maxwell-Garnett theory is inappropriate to describe the optical properties of granular lithium deposits. A generalized Maxwell-Garnett theory for ellipsoidal particles, which takes the interactions between particles into account, is used. Good agreement between experiment and theory is obtained.