Picosecond laser-pump, x-ray probe spectroscopy of GaAs
Picosecond laser-pump, x-ray probe spectroscopy of GaAs
复制标题
GaAs 的皮秒激光泵浦、X 射线探针光谱
DOI：
10.1063/1.1516849
复制
发表时间：
2002
影响因子：
1.6
通讯作者：
D. Reis
中科院分区：
文献类型：
--
作者：
B. Adams;M. DeCamp;E. Dufresne;D. Reis
A laser-pump, x-ray probe spectroscopic experiment is described, and the results are shown. The Ga Kα x-ray fluorescence following x-ray absorption, at the Ga K absorption edge was measured, and its increase due to excitation with subpicosecond pulses of laser light at 4.6 eV photon energy was determined. The x-ray absorption, and thus the fluorescence, is increased for about 200 ps after the laser pulse because additional final states for the x-ray absorption are cleared in the valence band by the laser excitation. The technique could eventually lead to a femtosecond pump-probe spectroscopy with an absolute reference energy level and also to a femtosecond x-ray detector. This is of particular importance to future short-pulse x-ray sources, such as free-electron lasers.
