Effect of laser polarization on strong-field ionization and fragmentation of nitrous oxide molecules

• 来源期刊: 中国物理B（英文版）
• 关键词: strong laser field re-collision angular distribution nitrous oxide
• 年，卷（期）: 2019,（5）
• 页码范围: 98-103
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/28/5/053301

摘要

Ionization of molecules in femtosecond laser fields is the most fundamental and important step of various strong-field physical processes. In this study, we experimentally investigate strong field ionization of linear N2O molecules using a time-of-fl ight mass spectrometer in 800-nm laser fields. Yields of the parent ion and different fragment ions are measured as a function of laser intensity in the range of 2.0×1013 W/cm2 to 3.6×1014 W/cm2. We also investigate the dependence of strong field ionization and dissociation of N2O on laser ellipticity and polarization direction. The significant role of laser induced electron re-collision in the formation of highly charged fragment ions is proved. The physical mechanism of strong field ionization and fragmentation is discussed, based on our experimental results.