Expansion of MBE Machine to Include Dopants and Acquisition of Dopant Characterization Equipment

这笔拨款提供配件，扩展刚刚交付的Riber 32 MBE机器的功能，并购买材料表征仪器。机器扩展由两部分组成：一个热处理单元，产生更高的纯度和更高的吞吐量增长；和积液电池，电源和控制器，以允许添加掺杂剂。材料表征仪器将用于定量研究掺杂物的存在与mbe生长材料的电学和光学性质之间的关系；量化整体晶体质量，确定掺杂剂和载流子浓度和迁移率；并给出了载体类型和浓度作为材料深度的函数。这些仪器将扩大我们研究材料的基本电子和非线性光学特性的能力，以及制造和测试光子学的全光（非线性光学）和电光器件的能力。

This grant provides accessories that expand the capabilities of a just-delivered Riber 32 MBE machine and to purchase materials-characterization instrumentation. The machine expansion consists of two parts: a thermal treatment unit, resulting in higher purity and higher throughput growth; and effusions cells, power supplies, and controllers to permit dopants to be added. The materials-characterization instruments will be used to study quantitatively the relationship between the presence of dopants and the electrical and optical properties of the MBE-grown materials; to quantify overall crystal quality, to identify dopant and carrier concentration and mobility; and to give carrier type and concentration as a function of materials depth. These instruments will expand our capability to study the basic electronic and nonlinear optical properties of materials, and to fabricate and test all-optical (nonlinear optical) and electro-optic devices for photonics.