MRI: Development of a Full-Muller-Matrix Spectroscopic Ellipsometer for Far-IR Radiation at the National Synchrotron Light Source (NSLS-BNL)

技术摘要：这项核磁共振成像计划的重点是研制一台用于远红外同步辐射宽带光谱范围的全穆勒矩阵光谱椭偏仪。该椭偏仪将安装在国家同步加速器光源(NSLS)的一条红外光束线上，并将在NSLS和未来的NSLS-II上提供给通用用户实验程序。拟议的仪器将在从事太赫兹和远红外光谱学工作的不同大学之间建立更密切的合作，并将支持凝聚态物理的跨学科项目。这一发展的独特之处包括利用旋转延迟器和偏振器同时测量穆勒矩阵成分(包括第4行和第4列)的归一化光谱，从而提供有关所研究材料的电介电常数和磁导率张量的实部和虚部的直接信息。该仪器将有助于分析多铁性材料、超薄高K介电薄膜、磁性纳米氧化物、超导薄膜和其他强相关材料的介电和磁性。样品的性质将在高达10T的外部磁场的影响下，在高达10kbar的单轴压力下，在4至350K的温度范围内进行研究。基础研究、新仪器开发与研究生和本科生教育之间的整合，以及大学与布鲁克海文国家实验室的密切合作是这一计划的另一个重要方面。非技术摘要：本MRI计划集中于开发一种用于远红外和THz光谱范围的先进光谱椭偏仪。该仪器将利用国家同步辐射光源(NSLS)最亮的人造辐射源的优势。开发完成后，该椭偏仪将安装在NSLS的红外光束线上，并将提供给广大的光束线用户。拟议的仪器将在太赫兹和远红外光谱学领域的不同大学小组之间建立更密切的合作，并将支持凝聚态物理的跨学科项目。提出的椭偏仪的独特功能包括测量和分析从样品反射的光的线偏振和圆偏振，提供有关所研究材料的介电和磁性的直接信息。所提出的椭偏仪将有助于分析未来纳米电子学所需的材料，如多铁性、超薄高K介电薄膜、磁性纳米氧化物、超导薄膜和其他强相关材料。样品的性质将在外部磁场的影响下，在单轴压力下，在4至350K的温度范围内进行研究。基础研究、新仪器开发与研究生和本科生教育之间的整合，以及大学和布鲁克海文国家实验室之间的密切合作，是这项建议的其他重要方面。

Technical Abstract:This MRI Proposal focuses on the development of a full-Muller-matrix spectroscopic ellipsometer for a broadband spectral range of the far-infrared synchrotron radiation. This ellipsometer will be installed at one of the infrared beamlines of the National Synchrotron Light Source (NSLS) and will become available to General User experimental programs at NSLS, and in the future, at NSLS-II. The proposed instrument will establish closer collaboration between different Universities working with the THz and far-infrared spectroscopy and will support interdisciplinary projects in Condensed Matter Physics. The unique features of the proposed development include simultaneous measurements of normalized spectra of the Muller-matrix components (including the 4th row and 4th column) with the help of rotating retarders and polarizers providing direct information about the real and imaginary parts of both electrical permittivity and magnetic permeability tensors of the investigated materials. The proposed instrument will facilitate analysis of dielectric and magnetic properties of multiferroic materials, ultra-thin high-K dielectric films, magnetic nanostructured oxides, superconducting films, and other strongly correlated materials. The sample properties will be studied under the influence of an external magnetic field up to 10 T, under uniaxial pressure up to 10 kbars, and in the temperature range between 4 and 350 K. The integration between fundamental research, new instrumentation development, and the education of graduate and undergraduate students, as well as a close collaboration between Universities and Brookhaven National Lab are other important aspects of this proposal.Non-Technical Abstract: This MRI Proposal focuses on the development of an advanced spectroscopic ellipsometer for far-infrared and THz spectral ranges. This instrument will utilize the advantages of the brightest manmade source of radiation at the National Synchrotron Light Source (NSLS). Upon development, this ellipsometer will be installed at the infrared beamline of NSLS and will become available to the broad team of beamline Users. The proposed instrument will establish closer collaboration between different University groups working in the field of THz and far-infrared spectroscopy and will support interdisciplinary projects in Condensed Matter Physics. The unique features of the proposed ellipsometer include measurements and analysis of linear and circular polarization of light reflected from the samples providing direct information about dielectric and magnetic properties of the investigated materials. The proposed ellipsometer will facilitate analysis of materials for the future nanoelectronics, such as multiferroics, ultra-thin high-K dielectric films, magnetic nanostructured oxides, superconducting films, and other strongly correlated materials. The sample properties will be studied under the influence of an external magnetic field, under uniaxial pressure, and in the temperature range between 4 and 350 K. The integration between fundamental research, new instrumentation development, and the education of graduate and undergraduate students, as well as a close collaboration between Universities and Brookhaven National Lab are other important aspects of this proposal.