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

提出了一项研究计划，利用x射线驻波实验的独特能力来确定在近乎完美的晶体衬底上生长的化学上不同的覆盖层的结构。采用特殊配置的超高真空分析系统，包括高能电子衍射和俄歇能谱，研究了锗表面晶格匹配碱卤化物的生长习性。该装置也适合于研究高能电子束入射激发的驻波，是一种新型的具有广泛适用性的表面结构探测器。锗上的I-Vii异质外延的成功研究将允许在原子距离上具有光学性质大扰动的异质结构的工程，这是一类具有近紫外线激发的全新材料。这些材料可能具有重要的技术应用，例如可能开发新的紫外激光器。

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.