Micro-Raman and Photoluminescence Spectrometer

在这项提案中，要求为共焦显微拉曼和光致发光光谱仪提供资金。该系统将用于全面研究晶体和混合量子和纳米材料，特别是二维（2D）材料。一个主要的重点是表征的晶体质量和2D材料和相关的货车德瓦尔斯（vdW）异质堆叠和混合结构的界面特性。这些结构主要通过微机械剥离和vdW组装来制备。待研究的材料的实例包括半导体过渡金属二硫属化物（TMDC）、石墨烯、六方氮化硼、2D膜中的基于缺陷的量子发射器、磁性和多铁性2D材料、具有晶体相变的2D极性金属、部分嵌入场效应电路中的扭曲均质和异质双层，以及由例如Mie空洞与具有强激子光物质相互作用的2D材料相结合。一个特别的重点是扭曲双层的实验实现和研究莫特-哈伯德模拟器的调查。自2D材料的全球深入研究开始以来，使用拉曼光谱在实验上可获得的所谓声子指纹已被证明是获得2D材料和相关异质和混合结构的性质的非常重要的工具。声子模式对材料和晶体结构的类型、层数、应变、缺陷、电荷载流子密度、温度、层间耦合敏感，并且在扭曲层的情况下还对两层之间的角度敏感。所提出的共焦μ-拉曼显微镜用于非破坏性地研究和表征这些性质，并且具有衍射限制的横向分辨率，具有使用非共振拉曼光谱的高通量。显微拉曼光谱和显微光致发光光谱相结合的方法被确立为一种非常强大的方法，可以全面评估晶体固体的质量和均匀性，特别是2D结构和vdW组件。该方法的全面性和易用性对生成结构的质量有直接影响。分析方法的灵敏度、威尔斯、每次可分析的样品数量限制了可制备的结构的质量和数量。因此，可以生产的高质量样品的数量受到表征吞吐量的限制。所要求的微拉曼和光致发光系统将使这种高质量和高通量的分析即使是没有光学设置经验的用户也可以使用，而无需大量的培训。

In this proposal, the funding of a confocal micro-Raman and photoluminescence spectrometer is requested. This system will be used for the comprehensive investigation of crystalline and hybrid quantum and nanomaterials, in particular two-dimensional (2D) materials. A major focus is on the characterization of the crystal quality and the interfacial properties of 2D materials and related van der Waals (vdW) heterostacks and hybrid structures. Those structures are mostly prepared by micromechanical exfoliation and vdW assembly. Examples of the materials to be studied include semiconducting transition metal dichalcogenides (TMDC), graphene, hexagonal boron nitride, defect-based quantum emitters in 2D membranes, magnetic and multiferroic 2D materials, 2D polar metals with crystal phase transitions, twisted homo- and heterobilayers partially embedded in field-effect circuits, as well as hybrid structures consisting, for example, of Mie-Voids combined with 2D materials with strong excitonic light-matter interaction. A special focus is on the investigation of twisted bilayers for the experimental realization and study of Mott-Hubbard simulators. Since the start of intensive worldwide research on 2D materials, the so-called phonon fingerprint, which is experimentally accessible using Raman spectroscopy, has proven to be a very important tool to access the properties of 2D materials and related hetero- and hybrid structures. The phonon modes are sensitive to type of material and crystal structure, number of layers, strains, defects, charge carrier density, temperature, interlayer coupling, and in the case of twisted layers also to the angle between two layers. The proposed confocal µ-Raman microscope is used to study and characterize those properties non-destructively and with diffraction-limited lateral resolution with high throughput using non-resonant Raman spectroscopy. The combined micro-Raman and Micro-photoluminescence spectroscopy is established as a very powerful method to comprehensively assess the quality and homogeneity of crystalline solids and in particular of 2D structures and vdW assemblies. Comprehensive and easy access to this methodology has a direct effect on the quality of the generated structures. The sensitivity of the analytical methods as wells as the number of samples that can be analyzed per time limits the quality and the quantity of structures that can be prepared. The number of high-quality samples that can be produced is therefore limited by the throughput of the characterization. The requested mirco-Raman and photoluminescence system will make this high-quality and high throughput analysis accessible even to users who are not experienced in optical setups without an extensive training period.