Measuring system for time and spatially resolved optical spectroscopy

时间和空间分辨光谱测量系统

• 批准号: 537598070
• 金额: --
• 依托单位: Philipps-Universität Marburg
• 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/537598070?language=en
• 关键词: Measuring; system; time; spatially; resolved

In the field of semiconductor optics, time-resolved photoluminescence spectroscopy is an established, informative and robust approach for non-destructive investigations of the dynamics of optical excitations. The technique is based on the optical excitation of semiconductor materials by a short-pulse laser source and the recording of the temporally resolved luminescence signal, which is performed by a streak camera in the measuring station applied for here. The planned setup will be used in the research of several groups of the departments of physics and chemistry at the Philipps-Universität Marburg. For the semiconductor spectroscopy group, the instrument will be the central apparatus for experimental work. The junior research group investigates organic and perovskite semiconductors, as well as hybrid materials and heterostructures. Time-resolved luminescence spectroscopy is employed to characterize the relationships between structural and optical properties, transport mechanisms of optical excitations, and charge and energy transfer processes at internal interfaces. Furthermore, the interactions between optical excitations and structural relaxation are of interest, leading to localization effects and the formation of polarons or excimers. The instrument will also be used by the Semiconductor Photonics group for the characterization of two-dimensional semiconductors to provide complementary information on terahertz emission characteristics from which the underlying charge carrier dynamics can be inferred. Moreover, there are other research groups in the applicant's environment in whose research the proposed large-scale instrument can be used to great advantage, especially for characterizing novel compounds such as luminophores or organic-inorganic hybrid materials. Correlating the spectrally and spatially resolved information with excitation dynamics is of outstanding importance for many of the topics mentioned above. On the one hand, the diffusion behavior of excited charge carriers or excitons can be traced and correlated with spectral information, allowing for the development robust kinetic models. On the other hand, luminescence dynamics can also be correlated with local microstructure, for example to characterize heterogeneous materials. In certain cases, the targeted experiments require a very precise setting of the excitation conditions and the dynamic processes take place on a variety of time scales, depending on the material. Therefore, there are high demands regarding the flexibility of the setup, which will be purchased modularly from different suppliers. The system applied for strengthens the available methodology for the investigation of dynamic processes in a variety of materials and bears the potential for fruitful usage in future collaborative projects.

在半导体光学领域，时间分辨光致发光光谱是一种成熟的、信息丰富且稳健的方法，用于光学激发动力学的无损研究，该技术基于短脉冲激光源对半导体材料的光学激发。以及时间发光信号的记录，该信号由此处申请的测量站中的条纹相机解析。计划的装置将用于物理和化学系的几个小组的研究。对于菲利普斯马尔堡大学的半导体光谱学小组来说，该仪器将成为初级研究小组研究有机和钙钛矿半导体以及混合材料和异质结构的中心仪器。结构和光学性质之间的关系、光学激发的传输机制以及内部界面的电荷和能量转移过程。此外，光学激发和结构弛豫之间的相互作用也很有趣，从而导致局域化效应和形成。半导体光子学小组还将使用该仪器来表征二维半导体，以提供有关太赫兹发射特性的补充信息，从而可以推断出潜在的电荷载流子动力学。在申请人的研究环境中，所提出的大型仪器可以发挥很大的优势，特别是用于表征新型化合物，例如发光体或有机-无机杂化材料。具有激发动力学的空间分辨信息对于上述许多主题具有突出的重要性，一方面，可以追踪激发电荷载流子或激子的扩散行为并将其与光谱信息相关联，从而可以开发稳健的动力学模型。另一方面，发光动力学也可以与局部微观结构相关，例如表征异质材料在某些情况下，目标实验需要非常精确的激发条件设置，并且动态过程发生在各种时间尺度上。于因此，对于材料设置的灵活性有很高的要求，该系统将从不同的供应商处模块化购买，该系统增强了研究各种材料动态过程的可用方法，并具有在各种材料中有效使用的潜力。未来的合作项目。