Micro-Raman and Photoluminescence Spectrometer

显微拉曼和光致发光光谱仪

• 批准号: 534959777
• 金额: --
• 依托单位: Universität Münster
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2024
• 资助国家: 德国
• 起止时间: 2023-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/534959777?language=en
• 关键词: Micro; Raman; Photoluminescence; Spectrometer

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.

在此提案中，请求共聚焦微拉曼和光致发光光谱仪的资金。该系统将用于晶体和混合量子和纳米材料的综合投资，特别是二维（2D）材料。主要的重点是2D材料和相关范德华（VDW）异源性和杂种结构的晶体质量和界面特性的表征。这些结构主要是通过微机械剥落和VDW组装来制备的。 Examples of the materials to be studiod 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组成的杂种结构，例如，MIE-Voids与2D材料结合使用，并具有浓郁的光线相互作用。特别的重点是扭曲的双层投资用于实现Mott-Hubbard模拟器的实验性实现和研究。自从对2D材料进行深入的全球研究开始以来，使用拉曼光谱可以在实验上访问的所谓声子指纹已被证明是访问2D材料以及相关异质和混合结构的性能的非常重要的工具。声子模式对材料和晶体结构的类型敏感，层，应变，缺陷，电荷载体密度，温度，层间耦合，在扭曲层的情况下也达到两个层之间的角度。所提出的共聚焦µ-RAMAN显微镜用于研究和表征这些特性，并使用非谐波拉曼光谱法具有高吞吐量的衍射限制的横向分辨率。建立了合并的微拉曼和微功能光谱光谱法作为一种非常有力的方法，可以全面评估晶体固体的质量和均匀性，尤其是2D结构和VDW组件的质量和同质性。全面且容易访问此方法对生成的结构的质量有直接影响。分析方法的敏感性以及可以分析的样品数量的敏感性限制了可以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的吞吐量的限制。所需的Mirco-Raman和光致发光系统将使即使在没有长期培训期的光学设置中经验丰富的用户也可以访问这种高质量和高吞吐量分析。