MRI: Development of an Ultrafast Time-Resolved Microscope for Imaging of Charge Carrier Dynamics in Complex Materials

有了这项来自主要研究仪器计划的奖项，匹兹堡大学将能够开发一种独特的仪器，用于研究固态材料中的动量和空间分辨电荷载流子动力学。光电发射电子显微镜和双光子光电发射的超快激光激发的组合将用于固态材料中电子的时空成像，其空间分辨率小于20纳米，时间分辨率小于1飞秒。 拟议的时间分辨光电子显微镜将提供几个数量级的更好的分辨率比目前可用的技术，这是必要的，以获得动态图像量子力学现象在固态材料。该研究的预期成果是更好地理解量子体系中的电荷载流子动力学，发现新的物理现象，提高对光学和电子器件的理解，以及对学生进行仪器科学和纳米科学的教育。匹兹堡大学将能够开发一种独特的仪器，用于研究固态材料中的动量和空间分辨的电荷载流子动力学。随着光学和电子器件的尺寸缩小到纳米尺度，描述其性质的物理学从经典到量子领域。这提出了一个需要的仪器成像的动态电子性能在纳米尺度上。 一种独特的时间分辨显微镜仪器将提供前所未有的能力，以创造不到一个飞秒的时间和不到20纳米的空间分辨率的电影如何在固态材料中的电子在能量，空间和时间演变。 该开发项目将教育学生在纳米技术和器件物理学的前沿激光，真空和显微镜技术。时间分辨显微镜将为理解新的物理现象和开发先进的光学和电子器件提供不可或缺的战略工具。

With this award from the Major Research Instrumentation Program, the University of Pittsburgh will be able to develop a unique instrument for studying both momentum and spatially resolved charge carrier dynamics in solid state materials. The combination of photoemission electron microscopy and ultrafast laser excitation of two-photon photoemission will be used for the spatiotemporal imaging of electrons in solid-state materials with less than twenty nanometer spatial resolution and less than one femtosecond temporal resolution. The proposed time-resolved photoemission electron microscope will offer several orders-of-magnitude better resolution over the currently available technology, which is necessary to obtain dynamical images quantum mechanical phenomena in solid state materials. The expected outcome of the research is a better understanding of charge carrier dynamics in the quantum regime, discovery of new physical phenomena, improved understanding of optical and electronic devices, and education of students in instrument science and nano-science.With this award from the Major Research Instrumentation Program, the University of Pittsburgh will be able to develop a unique instrument for studying both momentum and spatially resolved charge carrier dynamics in solid state materials. As the size of optical and electronic devices shrinks to the nanometer scale, the physics describing their properties changes from the classical to the quantum regime. This presents a need for instrumentation for imaging of the dynamical electronic properties on nanometer scale. A unique instrument for time-resolved microscopy to be developed will provide an unprecedented ability to create movies with less than one femtosecond temporal and less than twenty nanometers spatial resolution of how electrons in a solid state material evolve in energy, space, and time. The development project will educate students in techniques of lasers, vacuum, and microscopy at the forefront of nanotechnology and device physics. The time-resolved microscope will provide an indispensable and strategic tool for understanding novel physical phenomena and for developing advanced optical and electronic devices.