CAREER: Probing Charge Transport by Terahertz Time-Domain Spectroscopy

这个教师早期职业发展项目旨在开发一个综合的研究和教育计划，解决有关电荷传输的科学问题，同时在凯斯西储大学提供科学和工程教育的显着进步。 该研究计划将使用太赫兹时域光谱学来获得材料电导率的数据，而无需接触，并且在需要时具有亚皮秒时间分辨率。这些能力将被应用于研究难以通过其他手段解决的问题，包括光激发绝缘体和半导体纳米粒子的导电性。为了了解电导率的性质，将测量频率依赖性电导率及其时间演变。这些研究活动，特别是与光学和激光有关的研究活动，在协调的教育活动中发挥着关键作用。 该教育计划旨在影响从普通公众和高中生到科学和工程研究生的群体。重点将放在课程和指导的进步，这将促进妇女和其他代表性不足的群体在科学和工程学科的参与。这个教师早期职业发展项目旨在开发一个综合的研究和教育计划，解决尚未解决的科学问题，有关电荷传输，同时提供在凯斯西储大学科学和工程教育的进步。 允许这些新的科学测量的实验工具是太赫兹时域光谱学。这种方法基于飞秒脉冲激光器的能力，允许非常快速，非接触式测量许多材料系统的电导率。该方法将用于研究各种具有重要科学和技术意义的大块和纳米级材料中电荷在电场影响下的运动。这一研究成果对凝聚态物理和材料物理等学科具有重要意义。 它们也有可能影响几个主要的技术领域，包括电子、光电子和传感，其中导电性至关重要。 协调一致的教育方案基础广泛。它将突出在各级教育中推进光学和激光，从而提高这一领域的劳动力。 教育方案的另一个具体目标是增加妇女和其他代表性不足的群体对科学和工程的参与。

This Faculty Early Career Development project aims to develop an integrated research and education program that addresses scientific questions concerning the electrical charge transport, while simultaneously providing significant advances in science and engineering education at Case Western Reserve University. The research program will use terahertz time-domain spectroscopy to obtain data on the conductivity of materials without the need of contacts and, when required, with sub-picosecond time resolution. These capabilities will be applied to examine problems that are difficult to address by other means, including the conductivity of photo-excited insulators and of semiconductor nanoparticles. To understand the nature of the conductivity, measurements will be made of frequency dependence conductivity and its temporal evolution. These research activities, particularly as related to optics and lasers, play a critical role in the coordinated educational activities. The educational program is designed to impact groups ranging from the general public and high-school students to science and engineering graduate students. Emphasis will be placed on advances in curricula and mentoring that will promote the participation of women and other under-represented groups in science and engineering disciplines.This Faculty Early Career Development project aims to develop an integrated research and education program that addresses unresolved scientific questions concerning electrical charge transport, while simultaneously providing advances in science and engineering education at Case Western Reserve University. The experimental tool that will permit these new scientific measurements is terahertz time-domain spectroscopy. This approach, based on the capabilities of femtosecond pulsed lasers, permits very fast, non-contact measurements of electrical conductivity in many material systems. The method will be used to examine the motion of charges under the influence of an electric field in a variety of scientifically and technologically important bulk and nano-scale materials. The scientific results will be of significance for the disciplines of condensed-matter and materials physics. They also have the potential to impact several major areas of technology, including electronics, optoelectronics, and sensing, in which electrical conductivity is of critical importance. The coordinated educational program is broad based. It will highlight advancing optics and lasers at all levels in education, thus enhancing the workforce in this area. A specific additional aim of the educational program is to increase participation of women and other under-represented groups in science and engineering.