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、信息丰富的、稳健的方法，用于光激发动力学的非破坏性研究。该技术基于通过短脉冲激光源对半导体材料的光激发和时间分辨的发光信号的记录，该记录由在此应用的测量站中的条纹相机执行。计划的设置将用于马尔堡菲利普斯大学物理和化学系的几个小组的研究。对于半导体光谱学小组来说，该仪器将是实验工作的中心设备。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。时间分辨发光光谱被用来表征结构和光学性质之间的关系，光激发的传输机制，以及在内部接口的电荷和能量转移过程。此外，光激发和结构弛豫之间的相互作用是感兴趣的，导致局域化效应和极化子或准分子的形成。该仪器还将被半导体光子学小组用于二维半导体的表征，以提供有关太赫兹发射特性的补充信息，从中可以推断出潜在的电荷载流子动力学。此外，在申请人的环境中还有其他研究小组，在他们的研究中，所提出的大型仪器可以被用于极大的优势，特别是用于表征诸如发光体或有机-无机混合材料的新型化合物。相关的光谱和空间分辨信息与激发动力学是非常重要的许多上述主题。一方面，激发的电荷载流子或激子的扩散行为可以被追踪并与光谱信息相关联，从而允许开发鲁棒的动力学模型。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地设置激发条件，并且动态过程根据材料在各种时间尺度上发生。因此，对设置的灵活性有很高的要求，这将从不同的供应商模块化购买。该系统应用于加强现有的方法，在各种材料的动态过程的调查，并承担了富有成效的使用在未来的合作项目的潜力。