期刊
CHINESE PHYSICS B
卷 28, 期 5, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/28/5/053301
关键词
strong laser field; re-collision; angular distribution; nitrous oxide
资金
- National Natural Science Foundation of China [11534004, 11874179, 11704149]
- Natural Science Foundation of Jilin Province, China [20180101289JC]
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-flight 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 x 10(13) W/cm(2) to 3.6 x 10(14) W/cm(2). 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.
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