Laser Induced Disordering of Quantum Wells: In Situ Fabri- cation and Analysis of Nanometer Scale Structures in a Scanning Electron Microscope

激光诱导量子井无序：扫描电子显微镜中纳米级结构的原位制造和分析

• 批准号: 8906853
• 负责人: Kerry Vahala
• 金额: $ 5.57万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-09-01 至 1990-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8906853&HistoricalAwards=false
• 关键词: Laser; Induced; Disordering; Quantum; Wells

In this proposal funding to purchase an Argon laser and certain optical components is requested. This equipment will be used to study a technique for creating lateral modulation of the bandgap in GaAs quantum well material. One goal of this research is to generate nanometer scale structures in two and three dimensions (so-called quantum wire and quantum dot structures) that can be incorporated in semiconductor laser active layers. This method will also be useful in fabricating other optical components, such as waveguides on a similar small scale. In the technique an Argon laser is used to locally melt the sample on a micron scale. Crystal quality of the region is maintained. In a more selective version of this technique we would use a dye laser pumped by the Argon laser to "resonantly" melt the quantum well. By means of a nanometer scale masking techniques or small scale intermixing of the well the principal investigator hopes to observe phenomena associated with this increased lateral confinement of the electron gas. Processing will occur inside a scanning electron microscope already equipped with a cathodoluminescence system so that in stiu processing and diagnostic tests can be run simultaneously.

在这项提案中，资助购买氩激光器和某些 需要光学元件。 这些设备将用于研究 在砷化镓中产生带隙横向调制的技术 量子阱材料 这项研究的一个目标是 二维和三维的纳米尺度结构（所谓的 量子线和量子点结构）， 半导体激光器有源层 这种方法也将是有用的， 制造其它光学部件，例如在类似的光学器件上的波导， 小规模。 在该技术中，氩激光器用于局部熔化 在微米尺度上的样品。 该地区的晶体质量是 树立政治意识 在这种技术的一个更有选择性的版本中，我们将 使用由氩激光器泵浦的染料激光器来“共振地”熔化 量子阱 通过纳米级掩模技术或 主要研究者希望， 为了观察与这种增加的侧向力相关的现象， 电子气体的限制。 处理将在 扫描电子显微镜已经配备了一个 阴极射线发光系统，以便进行实时处理和诊断 测试可以同时进行。