飞秒时间分辨光抽运探测技术及进展

文章简要介绍了飞秒时间分辨光抽运探测技术以及作者所在实验室的最新研究进展．灵敏度和信噪比是实验中的重要参数，文章着重介绍了作者在这两方面的改进，从而可检测到更微弱信号，并降低了使用的激光功率．配合具有光学窗口的液氦低温系统，还可对更多领域的材料进行研究，其中包括高温超导、生物化学样品和纳米材料等，并可给出物质内部结构等方面的重要信息．

Femtosecond time-resolved optical pump-probe technique and recent developments

Recent progress in femtosecond time - resolved optical pump - probe spectroscopy in our laboratory is reviewed briefly. Improvements in significant parameters such as the sensitivity and signal - to - noise ratio have been achieved so that much smaller signals can be detected. Using this system together with a static exchange gas continuous flow cryostat, various materials such as superconductors, nanomaterials, and semiconductors can be in- vestigated, and important results in material structure and other aspects can be obtained.