Dipartimento di Fisica, Politecnico Piazza Leonardo da Vinci 32, 20133 Milano, Italy and State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
Phys Rev Lett. 2013 Sep 20;111(12):123901. doi: 10.1103/PhysRevLett.111.123901. Epub 2013 Sep 16.
The attosecond streak camera method is usually implemented to characterize the temporal phase and amplitude of isolated attosecond pulses produced by high-order harmonic generation. This approach, however, does not provide any information about the carrier-envelope phase of the attosecond pulses. We demonstrate that the photoelectron spectra generated by an attosecond waveform and an intense synchronized infrared field are sensitive to the electric field of the attosecond pulse. The dependence on the carrier-envelope phase of the attosecond pulse is understood in terms of the coherent superposition of two photoelectron wave packets. This effect suggests an experimentally feasible method for complete reconstruction of attosecond waveforms.
阿秒条纹相机方法通常用于描述由高阶谐波产生的孤立阿秒脉冲的时域相位和振幅。然而，这种方法并不能提供关于阿秒脉冲载波包络相位的任何信息。我们证明，由阿秒波形和强同步红外场产生的光电子谱对阿秒脉冲的电场敏感。阿秒脉冲载波包络相位的依赖性可以用两个光电子波包的相干叠加来理解。这种效应为完全重建阿秒波形提供了一种可行的实验方法。
