| Identification of Above-Threshold Ionization by Imaging Photoelectrons from Ammonia Molecules in an Intense Femtosecond Laser Field |
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| 作者姓名： | 杨钦 冷静 王艳辉 孙亚楠 杜海滨 张栋栋 宋乐乐 赫兰海 刘福春 |
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| 作者单位： | 1. Institute of Atomic and Molecular Physics, Jilin University;2. Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University;3. College of Electronic Science and Engineering, State Key Laboratory on Integrated Optoelectronics, Jilin University;4. Department of Physics, No.151 Middle School of Changchun;5. Department of Comprehensive, Harbin City Vocational College;6. Jilin Institute of Chemical Technology |
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| 基金项目： | supported by the National Natural Science Foundation of China(Grant Nos. 11574116, 11534004, 11704147, and 10704028)； |
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| 摘 要： | The above-threshold ionization process of ammonia molecules induced by a femtosecond laser field at 800 nm is studied in the intensity range from 1.6 × 1013 to 5.7 × 1013 W/cm2. Channel switching under different laser intensities is observed and identified in the photoelectron kinetic energy spectra of ammonia. Based on the photoelectron kinetic energy distributions and the photoelectron angular distributions, the characteristic peaks observed are exclusively ass...
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