Electron, optical and acoustic characterization of advanced materials and microstructures

先进材料和微观结构的电子、光学和声学表征

• 批准号: 262604-2007
• 负责人: Herring, Rodney
• 金额: $ 1.78万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=427033
• 关键词: Electron; optical; acoustic; characterization; advanced

The objectives of the research are to construct new types of microscopes and develop new methods of microscopy in order to make new measurements of the properties of materials. The microscopes use holography to interfere electrons, photons and acoustic beams. The material properties are being determined from the intensity and phase of beams having passed through the materials. One microscopy method, energy-filtered diffracted beam holography (DBH) is being used to measure the coherence properties of plasmons and phonons from degree of coherence and spatial coherence width measurements, which will enable researchers to understand nanoscience and to develop nanotechnology. Energy-filtered DBH should also be able to measure the coherence properties of interband charges (electrons, holes, dopants) in electronic materials and the magnetic potential and coherence of magnons in magnetic materials. A confocal holography (CH) microscope will non-intrusively measure the absolute three-dimensional temperatures, compositions, electrostatic and magnetic potentials existing in materials. Various types of CH microscopes have been designed, simulated and are now under construction. A laser CH microscope will measure temperatures and compositions in fluids and solids to help explain heat and mass transport mechanisms. An acoustic CH microscope will measure temperatures and compositions of objects representative of human tissue for medical diagnostic purposes. An electron CH microscope will measure electrostatic and magnetic potentials in materials at the nanoscale with the ultimate goal of knowing the electron density existing between the atoms.

该研究的目标是构建新型显微镜，并开发新的显微镜方法，以便对材料的特性进行新的测量。显微镜使用全息术干涉电子、光子和声束。材料的性质是由穿过材料的光束的强度和相位确定的。一种显微镜方法，能量过滤衍射光束全息术（DBH）被用来测量等离子体和声子的相干性，从相干度和空间相干宽度测量，这将使研究人员了解纳米科学和开发纳米技术。能量过滤DBH还应该能够测量电子材料中带间电荷（电子、空穴、掺杂剂）的相干性以及磁性材料中磁振子的磁势和相干性。共焦全息显微镜可以非侵入性地测量材料中存在的绝对三维温度、成分、静电势和磁势。各种类型的CH显微镜已经设计，模拟，现在正在建设中。激光CH显微镜将测量流体和固体中的温度和成分，以帮助解释热量和质量传输机制。声学CH显微镜将测量代表人体组织的物体的温度和成分，用于医疗诊断目的。电子CH显微镜将测量纳米级材料中的静电势和磁势，最终目标是了解原子之间存在的电子密度。