期刊
SCIENCE
卷 334, 期 6053, 页码 195-200出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1210268
关键词
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资金
- Max Planck Society
- European Research Council [Attoelectronics-258501]
- Deutsche Forschungsgemeinschaft: Munich Centre for Advanced Photonics
- King Saud University-MPQ
- European Research Training Network ATTOFEL
Manipulation of electron dynamics calls for electromagnetic forces that can be confined to and controlled over sub-femtosecond time intervals. Tailored transients of light fields can provide these forces. We report on the generation of subcycle field transients spanning the infrared, visible, and ultraviolet frequency regimes with a 1.5-octave three-channel optical field synthesizer and their attosecond sampling. To demonstrate applicability, we field-ionized krypton atoms within a single wave crest and launched a valence-shell electron wavepacket with a well-defined initial phase. Half-cycle field excitation and attosecond probing revealed fine details of atomic-scale electron motion, such as the instantaneous rate of tunneling, the initial charge distribution of a valence-shell wavepacket, the attosecond dynamic shift (instantaneous ac Stark shift) of its energy levels, and its few-femtosecond coherent oscillations.
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