Characterizing carrier envelope phase of an isolated attosecond pulse with annular photoionization momentum spectra
Characterizing carrier envelope phase of an isolated attosecond pulse with annular photoionization momentum spectra
复制标题
用环形光电离动量谱表征孤立阿秒脉冲的载流子包络相位
DOI：
10.3788/col201715.110201
复制
发表时间：
2017-09
影响因子：
3.5
通讯作者：
姚建铨
中科院分区：
文献类型：
--
作者：
李猛;张贵忠;赵天琪;丁欣;姚建铨
载波包络相位（CEP）直接影响到孤立阿秒脉冲（IAP）的物理特性和许多强场过程，但实际上很难测量。为了获得更准确和完整的CEP表征，我们数值研究了IAP和红外（IR）脉冲叠加场电离氢原子的环形光电子动量谱。通过定义一个重叠参数，动量模式进行分类和优化，明确测量的旋转角的动量模式与CEP值。一系列的仿真验证了其鲁棒性。
The carrier envelope phase (CEP) has a direct impact on the physical properties of an isolated attosecond pulse (IAP) and many strong field processes, but it is difficult to measure in reality. Aiming at obtaining more accurate and complete characterization of CEP, we numerically investigate the annular photoelectron momentum spectra of the hydrogen atom ionized by overlapped fields of an IAP and an infrared (IR) pulse. By defining an overlapping parameter, the momentum patterns are classified and optimized for unambiguously measuring the rotation angle of a momentum pattern versus the CEP value. A series of simulations verify its robustness.