论文标题
高能量分辨率瞬态幽灵吸收光谱
High energy-resolution transient ghost absorption spectroscopy
论文作者
论文摘要
我们使用幽灵光谱和带有光泵和短波长辐射探针的泵探针方法来证明超快动力学的测量。幽灵光谱方法用于克服自由电子激光器在自由阵线激光器上强度强度和光谱波动的挑战，并提供高光谱分辨率，从而可以测量吸收光谱中的小能量转移。我们利用高分辨率来探索电荷载体激发和放松的动力学及其对硅对光诱导的结构变化的影响，通过测量在硅L2,3边缘附近的Si（100）膜的吸收谱的变化以及对光照明响应响应的伴随边缘移动的变化。
We demonstrate the measurement of ultrafast dynamics using ghost spectroscopy and a pump-probe approach with an optical pump and a short-wavelength radiation probe. The ghost spectroscopy approach is used to overcome the challenge of the strong intensity and spectrum fluctuations at free-electron lasers and to provide high -spectral resolution, which enables the measurement of small energy shifts in the absorption spectrum. We exploit the high resolution to explore the dynamics of the charge carrier excitations and relaxations and their impact on the photoinduced structural changes in silicon by measuring the variation of the absorption spectrum of a Si(100) membrane near the silicon L2,3 edge and the accompanying edge shifts in response to the optical illumination.
