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，时间分辨的光量光谱是一种已建立，有益且健壮的方法，用于对光学令人兴奋的动力学进行非破坏性研究。该技术基于短脉冲激光源对半导体材料的光学令人兴奋，并记录了暂时解析的发光信号，该信号是通过在此处应用的测量站中的条纹摄像头执行的。计划的设置将用于菲利普斯 - 纳弗里蒂特·马尔堡（Philipps-Universität）的几个物理和化学部门的研究。对于半导体光谱组，该仪器将是实验工作的中央设备。初级研究小组研究了有机和钙钛矿半导体，以及混合材料和异质结构。时间分辨的发光光谱用于表征结构和光学特性之间的关系，光兴奋的传输机制以及内部接口处的电荷和能量传递过程。此外，光学兴奋与结构弛豫之间的相互作用引起了人们的关注，从而导致定位效应和极性或准分子的形成。该仪器还将被半导体光子学组使用，以表征二维半导体，以提供有关Terahertz发射特性的完整信息，从中可以从中推断出基础电荷载体动力学。此外，应用程序环境中还有其他研究小组，其中所提出的大规模仪器可用于巨大优势，尤其是为了表征新型化合物，例如发光体或有机融合杂交材料。对于上述许多主题而言，将光谱和空间分辨的信息与兴奋动态相关联至关重要。一方面，激发荷载流子或激发子的扩散行为可以追溯到光谱信息并相关联，从而允许开发强大的动力学模型。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，有针对性的实验需要非常精确的兴奋条件设置，并且动态过程在各种时间尺度上进行，具体取决于材料。因此，对设置的灵活性有很高的要求，该设置将从不同的供应商处购买。该系统申请了优势，可用的方法论，用于在各种材料中投资动态流程，并具有未来协作项目中富有成果用途的潜力。