Scaling of wave-packet dynamics in an intense midinfrared field - PubMed (original) (raw)

. 2007 Jan 5;98(1):013901.

doi: 10.1103/PhysRevLett.98.013901. Epub 2007 Jan 4.

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Scaling of wave-packet dynamics in an intense midinfrared field

J Tate et al. Phys Rev Lett. 2007.

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Abstract

A theoretical investigation is presented that examines the wavelength scaling from near-visible (0.8 micro m) to midinfrared (2 micro 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 time-dependent Schrödinger equation (TDSE) in argon and the strong-field approximation in helium. The scaling of electron energies (lambda2), harmonic cutoff (lambda2), and attochirp (lambda -1) agree with classical mechanics, but it is found that, surprisingly, the harmonic yield follows a lambda -(5-6) scaling at constant intensity. In addition, the TDSE results reveal an unexpected contribution from higher-order returns of the rescattering electron wave packet.

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