CAREER: Probing Charge Transport by Terahertz Time-Domain Spectroscopy

职业：通过太赫兹时域光谱探测电荷传输

• 批准号: 0349201
• 负责人: Jie Shan
• 金额: --
• 依托单位: Case Western Reserve University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-01-15 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0349201&HistoricalAwards=false
• 关键词: CAREER; Probing; Charge; Transport; Terahertz

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.

这一学院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的科学和工程教育方面取得重大进展。该研究计划将使用太赫兹时间域光谱学来获得材料导电性的数据，而不需要接触，如果需要的话，时间分辨率为亚皮秒。这些能力将被用于研究其他方法难以解决的问题，包括光激绝缘体和半导体纳米颗粒的导电性。为了了解电导率的性质，将进行频率依赖电导率及其时间演化的测量。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各种群体。重点将放在课程和辅导方面的进展，以促进妇女和其他代表性不足的群体参与科学和工程学科。这一教职早期职业发展项目旨在开发一个综合研究和教育计划，解决与电荷运输有关的悬而未决的科学问题，同时在凯斯西储大学提供科学和工程教育方面的进展。使这些新的科学测量成为可能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的能力，可以非常快速、非接触地测量许多材料系统的电导率。这种方法将被用来研究电场影响下各种具有科学和技术重要性的块状和纳米材料中的电荷运动。这些科学成果将对凝聚态物理和材料物理学的学科具有重要意义。它们还有可能影响几个主要的技术领域，包括电子学、光电子学和传感，在这些领域中，导电性至关重要。协调的教育计划具有广泛的基础。它将突出各级教育中先进的光学和激光技术，从而加强这一领域的劳动力。该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在科学和工程领域的参与。