MRI: Development of a high-magnetic-field ultrafast and terahertz spectrometer for materials research in the Deep South

MRI：开发用于南方腹地材料研究的高磁场超快太赫兹光谱仪

基本信息

批准号：
1919944
负责人：
Diyar Talbayev
金额：
$ 73.51万
依托单位：
Tulane University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-09-01 至 2022-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1919944&HistoricalAwards=false
关键词：
MRI Development magnetic field ultrafast

项目摘要

This award to Tulane University from the Major Research Instrumentation program and the Office of Multidisciplinary Activities of the Directorate for Mathematical and Physical Sciences supports the design and building of an advanced scientific tool for studying how matter and materials behave when they are placed in very strong magnetic field. This instrument will consist of two main parts: a very strong superconducting magnet and a set of lasers. Laser light will be used to probe how materials react to the strong magnetic field and to very low temperatures. Upon completion of the instrument development, the instrument will be available to outside user. The major science drivers of this instrument is in quantum matter, the advancement of our understanding of how electrons behave inside a wide variety of materials and imbue them with their properties, such as magnetism or superconductivity. Such basic scientific understanding underpins many technological marvels such as in medical diagnostic devices, computing chips in our phones and tablets, magnetic data storage technology, cell phone cameras, new energy-efficient LED light bulbs, and more. Through basic physics research, the proposed instrument will promote the progress of physics and advance national prosperity. This instrument will also contribute to advanced education of graduate and undergraduate students, thus building an educated national workforce for the new century. As a priority, the team of researchers promotes the participation in science and engineering fields of women and underrepresented minorities from Xavier University of Louisiana, a local Historically Black College or University.This award supports the development of a multi-user instrument for ultrafast terahertz (THz) spectroscopy in high magnetic fields of up to 17 T. The magnet cryostat provides the sample temperature control in the 2.5-300 K range and is cryogen-free. Four high-field experimental modalities will be available in both Faraday and Voigt optical configurations: i) THz time-domain spectroscopy based on photoconductive antennas with 0.2 - 3 THz spectral range; ii) time-resolved THz spectroscopy based on air-plasma THz generation and air-breakdown detection with 0.3 - 10 THz spectral range; iii) second harmonic generation with sample rotation about the surface normal; iv) optical pump-probe spectroscopy. The instrument will enable innovative research in magneto-electric excitations and optical nonreciprocity in multiferroics; search for the optical signatures of the chiral anomaly and the non-trivial band topology in Weyl semimetals; second harmonic generation and optical pump-probe studies of topological and magnetic materials; time-resolved THz spectroscopy of high-temperature superconducting pnictides. The instrument will become a part of the nationwide advanced research infrastructure. The instrument is unique, as it far outperforms in its specifications and capabilities other similar university-based research tools in the United States. In addition to eleven identified outside groups who have expressed a strong interest in the instrument capabilities in the nearest term.The instrument attracts potential local users and from across the Nation. The project contributes to the training of next the generation instrument developers. In the long run it will contribute to the education of dozens of graduate and undergraduate students. The project explicitly promotes the participation of women and underrepresented minorities in sciences and engineering.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该奖项是从主要的研究仪器计划和数学和物理科学局多学科活动办公室授予的奖项，该奖项支持设计和构建先进的科学工具，用于研究何时将其放置在非常强大的磁场中时，它们的行为和材料的表现如何。该仪器将由两个主要部分组成：一个非常强大的超导磁铁和一组激光器。激光光将用于探测材料对强磁场和非常低温的反应。仪器开发完成后，该仪器将用于外部用户。该工具的主要科学驱动力是量子问题，我们对电子如何在各种材料中的表现，并将其赋予其特性（例如磁性或超导性）的理解发展。这种基本的科学理解为许多技术奇迹提供了支持，例如在医疗诊断设备中，计算我们的手机和平板电脑中的芯片，磁性数据存储技术，手机摄像头，新的节能LED灯泡等。通过基本的物理研究，拟议的工具将促进物理学的进步并促进民族繁荣。该乐器还将为研究生和本科生的高级教育做出贡献，从而为新世纪建立受过教育的国家劳动力。作为优先事项，研究人员团队促进了来自路易斯安那州Xavier University的妇女和代表性不足的少数群体的参与，这是一所历史悠久的黑人学院或大学。该奖项支持开发超快Terahertz（Terahertz（THZ）（THZ）的多用户工具的开发。无冷冻原料。 Faraday和VOIGT光学配置都将获得四个高场实验方式：i）基于光导态温度为0.2-3 THz光谱范围的THZ时域光谱； ii）基于0.3-10 THz光谱范围的空气质量THES的产生和空气破裂检测的时间分辨THZ光谱； iii）第二次谐波产生，围绕表面正常的样品旋转； iv）光泵探针光谱。该仪器将实现磁性激发和多表情中光学非肾脏的创新研究；搜索手性异常的光学特征和Weyl Semimetals中的非平凡带拓扑；拓扑和磁性材料的第二次谐波生成和光泵探针研究；高温超导PNICTIDES的时间分辨THz光谱。该工具将成为全国性高级研究基础设施的一部分。该工具是独一无二的，因为它在美国其他类似的大学研究工具的规格和功能上都远远超过了。除了确定的11个外部团体外，他们对最近的学期表达了对乐器功能的浓厚兴趣。该工具吸引了潜在的本地用户以及全国各地。该项目有助于对下一代仪器开发人员进行培训。从长远来看，它将有助于数十个研究生和本科生的教育。该项目明确促进了妇女和代表性不足的少数群体参与科学和工程学。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响审查标准，被认为值得通过评估。