Instrumentation for a time-resolved micro-spectroscopy setup

在此基础上，应用了时间分辨光谱仪器。该仪器由脉冲激光系统（主仪器）、光谱仪和附件组成。所申请的仪器将与现有的自行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微光谱装置。所应用的激光系统由钛蓝宝石激光器和光学参量振荡器组成。两者一起产生脉冲长度低于200fs的两列激光脉冲。脉冲的波长可以在可见光和近红外光谱区域的大部分范围内广泛调谐。激光系统的重复频率为80mhz，可以用脉冲拾取器降低。时间分辨的微光谱学设置将用于纳米光学领域，应用光谱学和显微镜的方法来探索纳米尺度上的光-物质相互作用。该系统将为纳米结构和纳米材料的动态过程的研究提供时间分辨率低于1ps的途径。这将使探测成为可能，例如，纳米级半导体及其器件中的载流子动力学。此外，脉冲激光系统的高峰值功率将使纳米结构的非线性光学研究成为可能，这是应用于仪器的第二个主要研究领域。该系统在调试后将应用的研究课题包括石墨烯纳米带的光谱学，以及探索π共轭分子的顺序对其光电性能的影响。激光系统波长的大可调性使其具有通用性，保证了其在未来光谱学研究中的适用性。

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.