X-Ray Standing Wave Investigation of Heteroepitaxy: Alkali Halides on Germanium

异质外延的 X 射线驻波研究：锗上的碱金属卤化物

• 批准号: 8703993
• 负责人: Stephen Durbin
• 金额: $ 11.13万
• 依托单位: Purdue Research Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-08-01 至 1990-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8703993&HistoricalAwards=false
• 关键词: Ray; Standing; Wave; Investigation; Heteroepitaxy

A research program is proposed which utilizes the unique capabilities of x-ray standing wave experiments to determine the structure of chemically distinct overlayers epitaxially grown on nearly perfect crystalline substrates. The growth habits of lattice matched alkali halides on germanium surfaces shall be studied in a specially configured ultra high vacuum analysis system which include high energy electron diffraction andAuger electron spectroscopy. This apparatus shall also be well-suited to investigate standing waves excited by an incident high energy electron beam, which may prove to be new surface structure probe of wide applicability. A successful study of I-Vii heteroepitaxy on germanium will permit the engineering of heterostructures with major perturbations in optical properties over atomic distances, an entirely new class of materials with excitations in the near ultra-violet. These materials may have important technological applications, such as the possible development of new ultra- violet lasers.

提出了一个研究方案，利用独特的 X射线驻波实验确定 外延生长的化学上不同的覆盖层的结构 近乎完美的晶体衬底。 的生长习性 锗表面上晶格匹配的碱金属卤化物应 在一个特殊配置的超高真空分析中进行研究 包括高能电子衍射和俄歇系统 电子光谱学 该仪器还应适合 研究入射高能激发的驻波 电子束是一种新的表面结构探针 适用性广。 I-VII族异质外延的成功研究 将允许异质结构的工程， 原子距离上光学性质的主要扰动， 一种全新的材料， 紫外线 这些材料可能具有重要的技术 应用，例如可能开发新的超 紫色激光。