Scaling of Wave-Packet Dynamics in an Intense Midinfrared Field

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fac_DiMauroL_PhysicalReviewLetters_2007_98_1.pdf (477.71 KB)

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2007-01-04

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American Physical Society

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A theoretical investigation is presented that examines the wavelength scaling from near-visible (0.8 µm) to midinfrared (2 µm) 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 (λ^2), harmonic cutoff (λ^2), and attochirp (λ^-1) agree with classical mechanics, but it is found that, surprisingly, the harmonic yield follows a λ^-(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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J. Tate et al, "Scaling of Wave-Packet Dynamics in an Intense Midinfrared Field," Physical Review Letters 98, no. 1 (2007), doi:10.1103/PhysRevLett.98.013901

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http://hdl.handle.net/1811/48056

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Ohio State University Research and Scholarship