Kitzler Markus, Milosevic Nenad, Scrinzi Armin, Krausz Ferenc, Brabec Thomas
Institut für Photonik, Technische Universität Wien, Gusshausstrasse 27/387, A-1040 Wien, Austria.
Phys Rev Lett. 2002 Apr 29;88(17):173904. doi: 10.1103/PhysRevLett.88.173904. Epub 2002 Apr 16.
The first reported measurements of single attosecond pulses use laser dressed single-photon extreme ultraviolet (XUV) ionization of gas atoms. The determination of XUV pulse duration from the electron spectrum is based on a classical theory. Although classical models are known to give a qualitatively correct description of strong laser atom interaction, the validity must be scrutinized by a quantum-mechanical analysis. We establish a theoretical framework for the accurate temporal characterization of attosecond XUV pulses. Our analysis reveals an improved scheme that allows for direct experimental discrimination between single and multiple attosecond pulses.
首次报道的单个阿秒脉冲测量是利用激光修饰的气体原子单光子极紫外（XUV）电离。从电子能谱确定XUV脉冲持续时间是基于经典理论。虽然已知经典模型能对强激光与原子的相互作用给出定性正确的描述，但必须通过量子力学分析来审视其有效性。我们建立了一个用于精确表征阿秒XUV脉冲时间特性的理论框架。我们的分析揭示了一种改进方案，该方案能够在实验上直接区分单个和多个阿秒脉冲。
