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arXiv · 0907.5384

Towards a theory of attosecond transient recorder

E. E. Krasovskii·M. Bonitz
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Abstract

Laser assisted photoemission by a chirped subfemtosecond extreme ultraviolet (XUV) pulse is considered within an exactly solvable quantum-mechanical model. Special emphasis is given to the energy dependence of photoexcitation cross-section. The streaked spectra are analyzed within the classical picture of initial time-momentum distribution r_ini(p,t) of photoelectrons mapped to the final energy scale. The actual time-momentum distribution in the absence of the probe laser field is shown to be a poor choice for r_ini, and a more adequate ansatz is suggested. The semiclassical theory offers a simple practically useful approximation for streaked spectra. Its limitations for sufficiently long chirped XUV pulses are established.

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E. E. Krasovskii, M. Bonitz. 2009-07-30. Towards a theory of attosecond transient recorder. https://doi.org/10.1103/physreva.80.053421

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