标题： 基于载波包络相位的二维光谱干涉术 显示英文标题

标题： Two-Dimensional Spectral Interferometry using the Carrier-Envelope Phase

摘要： 二维和多维光谱学在物理和化学中用于获得结构和动态信息，这些信息通过投影到一维数据集（如单一发射或吸收光谱）通常无法观察到。 在这里，我们通过采用载波包络相位（CEP）引入了一种定性上全新的二维光谱学方法。 与测量光谱对光谱的信息不同，光谱干涉和CEP控制的联合应用使得能够在阿秒时间尺度上测量原本不可分离的时间事件。 作为具体示例，我们将这种方法应用于阿秒脉冲序列生成的情况，其中它能够分离同一激光脉冲内三个不同的亚周期电子量子路径的贡献，从而更好地理解并量化截止区和平台区谐波之间的过渡区域。 两个全周期间隔的阿秒脉冲之间的CEP依赖的时间分离被确定为以（54 +/- 16）阿秒进行调制。 显示英文摘要

摘要： Two- and multi-dimensional spectroscopy is used in physics and chemistry to obtain structural and dynamical information that would otherwise be invisible by the projection into a one-dimensional data set such as a single emission or absorption spectrum. Here, we introduce a qualitatively new two-dimensional spectroscopy method by employing the carrier-envelope phase (CEP). Instead of measuring spectral vs. spectral information, the combined application of spectral interferometry and CEP control allows the measurement of otherwise inseparable temporal events on an attosecond time scale. As a specific example, we apply this general method to the case of attosecond pulse train generation, where it allows to separate contributions of three different sub-cycle electron quantum paths within one and the same laser pulse, resulting in a better physical understanding and quantification of the transition region between cutoff and plateau harmonics. The CEP-dependent separation in time between two full-cycle spaced attosecond pulses was determined to modulate by (54 +/- 16) attoseconds.