2007
DOI: 10.1103/physrevlett.98.013901
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Scaling of Wave-Packet Dynamics in an Intense Midinfrared Field

Abstract: A theoretical investigation is presented that examines the wavelength scaling from near-visible (0:8 m) to midinfrared (2 m) of the photoelectron distribution and high harmonics generated by a ''single'' atom in an intense electromagnetic field. The calculations use a numerical solution of the timedependent Schrödinger equation (TDSE) in argon and the strong-field approximation in helium. The scaling of electron energies ( 2 ), harmonic cutoff ( 2 ), and attochirp ( ÿ1 ) agree with classical mechanics, but it … Show more

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Cited by 555 publications
(480 citation statements)
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“…This is only valid for a single harmonic with both I p /ω 0 and U p /ω 0 constant [28]. Quantum-mechanics calculations suggested that single-atom HHG yield drops even more dramatically with laser wavelengths and scales as λ −5.5 0 for the fixed laser intensity and for a same photon energy interval [29][30][31].…”
Section: Wavelength Scaling Of Harmonic Efficiency and Attochirpmentioning
confidence: 99%
See 3 more Smart Citations
“…This is only valid for a single harmonic with both I p /ω 0 and U p /ω 0 constant [28]. Quantum-mechanics calculations suggested that single-atom HHG yield drops even more dramatically with laser wavelengths and scales as λ −5.5 0 for the fixed laser intensity and for a same photon energy interval [29][30][31].…”
Section: Wavelength Scaling Of Harmonic Efficiency and Attochirpmentioning
confidence: 99%
“…The yield of each harmonic is obtained by integrating over the whole plane perpendicular to the propagation axis. In When propagation effect is considered it is generally known [27,29] that phase-matching condition is more difficult to meet for longer-wavelength lasers, thus the HHG efficiency decreases with increasing wavelength. Here we consider the total HHG yields for the lasers used in Fig.…”
Section: Wavelength Scaling Of Harmonic Efficiencymentioning
confidence: 99%
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“…If these pulses are transform-limited, the resulting durations of the attosecond pulses are expected to range from 30 attoseconds down to even a few attoseconds. However, it is well known that high-order harmonics generated in a gas medium exhibit attochirps [16]. Over the broadband, the chirp can be quite significant if the phase has not been compensated [17].…”
Section: Introductionmentioning
confidence: 99%