Instrumentation for a time-resolved micro-spectroscopy setup

有了这个建议，时间分辨光谱仪器被应用。仪器包括脉冲激光系统（主仪器）、光谱仪和附件。所申请的仪器将与现有的自主开发的低温激光扫描显微镜装置相结合，形成用于纳米结构和纳米材料光谱学的时间分辨显微光谱学装置。激光系统由钛宝石激光器和光学参量振荡器组成。两者一起产生两列脉冲长度低于200 fs的激光脉冲。脉冲的波长可以在可见光和近红外光谱区的大部分范围内广泛调谐。激光系统的重复频率为80 MHz，可以通过脉冲拾取器降低。应用仪器实现的时间分辨显微光谱学设置将用于纳米光学领域，应用光谱学和显微镜方法探索纳米尺度上的光-物质相互作用。该系统将提供时间分辨率低于1 ps的纳米结构和纳米材料动态过程的研究。这将使探测成为可能，例如，纳米级半导体及其器件中的电荷载流子动力学。此外，脉冲激光系统的高峰功率将使纳米结构的非线性光学研究成为可能，这是第二个主要的研究领域，其中应用的仪器将被使用。该系统将在调试后应用的研究课题的例子是石墨烯纳米带的光谱学和探索π共轭分子的顺序对其光电性能的影响。激光系统的波长的大的可调谐性使其多功能，保证其在光谱研究中的适用性在未来。

With this proposal instrumentation for time-resolved spectroscopy is applied for. The instrumentation consists of a pulsed laser system (main instrument), spectrometer, and accessories. The applied for instrumentation will be combined with an existing self-developed low-temperature laser-scanning microscopy setup to form a time-resolved micro-spectroscopy setup for the optical spectroscopy of nanostructures and nanomaterials. The laser system applied for consists of a titanium:sapphire laser and an optical parametric oscillator. Together the two produce two trains of laser pulses with a pulse length below 200 fs. The wavelength of the pulses can be tuned broadly over a large part of the visible and near-infrared spectral region. The repetition rate of the laser system is 80 MHz and can be lowered with a pulse picker.The time-resolved micro-spectroscopy setup enabled by the applied for instrumentation will be used in the field of nano-optics, applying methods of optical spectroscopy and microscopy to explore light-matter interactions on the nanoscale. The system will give access to the study of dynamical processes in nanostructures and nanomaterials with a time-resolution below 1 ps. This will enable probing, e.g., charge carrier dynamics in nanoscale semiconductors and devices thereof. Additionally, the high peak power of the pulsed laser system will enable nonlinear optical studies of nanostructures, which is a second major area of research in which the applied for instrumentation will be used. Examples of research topics in which the system will be applied after commissioning are optical spectroscopy of graphene nanoribbons and in exploring the influence of order of pi-conjugated molecules on their optoelectronic properties. The large tunability of the wavelengths of the laser system makes it versatile guaranteeing its applicability in spectroscopic studies in the future.