@article{oai:nagoya.repo.nii.ac.jp:00022821,
 author = {Endo, Tomoyuki and Matsuda, Akitaka and Fushitani, Mizuho and Yasuike, Tomokazu and Tolstikhin, Oleg I. and Morishita, Toru and Hishikawa, Akiyoshi},
 journal = {Physical Review Letter},
 month = {Apr},
 note = {Tunneling-ionization imaging of photoexcitation of NO has been demonstrated by using few-cycle near-infrared intense laser pulses (8 fs, 800 nm, 1.1×1014  W/cm2). The ion image of N+ fragment ions produced by dissociative ionization of NO in the ground state, NO (X2Π,2π)→NO++e−→N++O+e−, exhibits a characteristic momentum distribution peaked at 45° with respect to the laser polarization direction. On the other hand, a broad distribution centered at ∼0° appears when the A2Σ+ (3sσ) 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.},
 pages = {163002--163002},
 title = {Imaging Electronic Excitation of NO by Ultrafast Laser Tunneling Ionization},
 volume = {116},
 year = {2016}
}