Subcycle characterization of photoelectron emission with multicycle laser pulses
作者： Qinying Ji , Junping Wang , Peifeng Lu , Hui Li , Xiaochun Gong
DOI: 10.1103/PHYSREVA.96.053423
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摘要: By partially overlapping two time-delayed orthogonally polarized multicycle laser pulses of the same carrier frequency, we construct an optical waveform whose polarization axis rotates slowly for consecutive cycles. This unique field tunnel-ionizes atoms and accelerates freed electrons to different directions at instants. Classical trajectory Monto Carlo simulations support resulting angle-resolved photoelectron momentum distribution. Taking advantage this field, investigate characteristics triggered by quarters cycle explore Coulomb focusing effect on traveling along trajectories. Our experiment using a polarization-skewed near-infrared pulse verifies numerical demonstrates feasibility retrieving subcycle dynamics with pulses.
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