期刊
SCIENCE ADVANCES
卷 1, 期 8, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.1500356
关键词
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资金
- Photon Frontier Network Program of the Ministry of Education, Culture, Sports, Science and Technology (MEXT) Japan
- Japan Society for the Promotion of Science (JSPS) [26600123, 26247068, 25286074, 26600122, 26220606]
- Grants-in-Aid for Scientific Research [15H03581, 26600123, 26600122, 26220606, 25286074, 15H05696, 26247068] Funding Source: KAKEN
Capturing electron motion in a molecule is the basis of understanding or steering chemical reactions. Nonlinear Fourier transform spectroscopy using an attosecond-pump/attosecond-probe technique is used to observe an attosecond electron wave packet in a nitrogen molecule in real time. The 500-as electronic motion between two bound electronic states in a nitrogen molecule is captured by measuring the fragment ions with the same kinetic energy generated in sequential two-photon dissociative ionization processes. The temporal evolution of electronic coherence originating from various electronic states is visualized via the fragment ions appearing after irradiation of the probe pulse. This observation of an attosecond molecular electron wave packet is a critical step in understanding coupled nuclear and electron motion in polyatomic and biological molecules to explore attochemistry.
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