Abeles B, Gittleman J I
Appl Opt. 1976 Oct 1;15(10):2328-32. doi: 10.1364/AO.15.002328.
The optical properties of the composite systems Ag-SiO(2), Si-SiC, and Ge-Al(2)O(3) are compared with the predictions of the Maxwell-Garnett and the effective medium theories. Only the Maxwell-Garnett theory predicts the characteristic optical features of granular metals-a red shift relative to the pure metal in the plasma resonance and a dielectric anomaly. In the case of Si-SiC, the observed red shift in the transverse optical phonon frequency is too small to allow one to discriminate between the two theories. In the case of the Ge-AI(2)O(3) films, both theories are in good agreement with the experimental results for the optical constants near the absorption edge. The use of composite films for photothermal conversion and other optical applications is discussed.
将复合体系Ag-SiO(2)、Si-SiC和Ge-Al(2)O(3)的光学性质与麦克斯韦-加内特理论和有效介质理论的预测结果进行了比较。只有麦克斯韦-加内特理论预测了粒状金属的特征光学特性——相对于纯金属，等离子体共振中的红移和介电异常。在Si-SiC的情况下，观察到的横向光学声子频率的红移太小，无法区分这两种理论。对于Ge-AI(2)O(3)薄膜，两种理论都与吸收边附近光学常数的实验结果吻合良好。讨论了复合薄膜在光热转换和其他光学应用中的用途。
