Journal
PHYSICAL REVIEW A
Volume 83, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.83.053804
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Funding
- Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia (CNISM)
- National Science Foundation [PHY-0449235]
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Conical Bessel-like pulses allow control of the propagation velocity of the main intensity peak. With few-cycle pulses, this leads to a controllable shearing effect with respect to the carrier-phase oscillation and a consequent variation of the instantaneous intensity during propagation. Numerical simulations highlight how this intensity modulation directly controls the atomic dipole phase in the process of high-order harmonic generation and isolates either the long or the short electron-trajectory contributions. We identify a propagation regime in which the harmonic field takes the form of an isolated pulse of 300 as duration.
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