Optical Properties of Small Metal and Dielectric Structures

在化学系物理化学项目和物理系原子、分子和光学物理项目中，维克森林大学物理系的Keith Bonin教授将测量中性和离子锂团簇、中性和离子钠团簇以及富勒烯类型碳结构的标量和张量极化率。测量频率为1059 nm，能量为1.17 eV；氢气斯托克斯喇曼移动线为1907 nm，能量为0.65 eV。实验方法将基于新开发的轻力技术。电极化率是分子体系的一个重要性质。所谓的动态极化率，即与频率相关的极化率，可作为电响应性质的电子结构计算的基准。测量将在气相中的自由、单团簇单元上进行，结果与凝聚相的结果相关联。由此得到的数据将有助于更好地理解从气体到凝聚相的转变，以及材料的电学和电光性质。

In this project in the Physical Chemistry program of the Chemistry Division and the Atomic, Molecular and Optical Physics program of the Physics Division, Prof. Keith Bonin of the Physics Department of Wake Forest University will measure the scalar and tensor polarizabilities of neutral and ionic lithium clusters, neutral and ionic sodium clusters, and fullerene-type carbon structures. The measurements will be made at two frequencies, that of the Nd:YAG laser fundamental at 1059 nm, corresponding to an energy of 1.17 eV, and that of the Hydrogen, Stokes Raman shifted line at 1907 nm, corresponding to an energy of 0.65 eV. The experimental method will be based on the newly developed light force technique. The electrical polarizability is an important property of a molecular system. The so-called dynamical, i.e., frequency dependent, polarizabilities serve as benchmarks for electronic structure calculations of electric response properties. The measurements will be made on free, single cluster units in the gas phase and the results correlated to those for the condensed-phase. The data thus obtained will contribute to a better understanding of the transition from the gas to the condensed phase, and the electrical and electro-optical properties of materials.