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

doi:10.1088/1674-1056/28/5/053301

Abstract

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 2.0×10¹³ 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.

Keywords: strong laser field re-collision angular distribution nitrous oxide

Received: 02 January 2019
Revised: 31 January 2019
Accepted manuscript online:

PACS:

33.80.Rv

(Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))

Fund:

Project supported by the National Natural Science Foundation of China (Grant Nos. 11534004, 11874179, and 11704149) and the Natural Science Foundation of Jilin Province, China (Grant No. 20180101289JC).

Corresponding Authors: Hang Lv, Hai-Feng Xu
E-mail: lvhang0811@jlu.edu.cn;xuhf@jlu.edu.cn

Cite this article:

Rui Wang(王瑞), Shi-Wen Zhang(张世文), Yang Liu(刘洋), Tian Sun(孙添), Hang Lv(吕航), Hai-Feng Xu(徐海峰) Effect of laser polarization on strong-field ionization and fragmentation of nitrous oxide molecules 2019 Chin. Phys. B 28 053301

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

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