2016年
Imaging Electronic Excitation of NO by Ultrafast Laser Tunneling Ionization
Physical Review Letters
- ,
- ,
- ,
- ,
- ,
- ,
- 巻
- 116
- 号
- 16
- 開始ページ
- 163002
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevLett.116.163002
- 出版者・発行元
- AMER PHYSICAL SOC
Tunneling-ionization imaging of photoexcitation of NO has been demonstrated by using few-cycle near-infrared intense laser pulses (8 fs, 800 nm, 1.1 x 10(14) W/cm(2)). The ion image of N+ fragment ions produced by dissociative ionization of NO in the ground state, NO (X-2 Pi; 2 pi) -> NO+ + e(-) -> N+ + O + e(-), exhibits a characteristic momentum distribution peaked at 45 degrees with respect to the laser polarization direction. On the other hand, a broad distribution centered at similar to 0 degrees appears when the A(2)Sigma(+) (3s sigma) excited state is prepared as the initial state by deep-UV photoexcitation. The observed angular distributions are in good agreement with the corresponding theoretical tunneling ionization yields, showing that the fragment anisotropy reflects changes of the highest-occupied molecular orbital by photoexcitation.
- ID情報
-
- DOI : 10.1103/PhysRevLett.116.163002
- ISSN : 0031-9007
- eISSN : 1079-7114