Characterizing carrier envelope phase of an isolated attosecond pulse with annular photoionization momentum spectra

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2017,（11）
• 页码范围: 1-5
• 页数: 5页
• 语种: 英文
• DOI: 10.3788/COL201715.110201

摘要

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.