An expression for the total probability of photoprocesses induced by ultrashort electromagnetic pulses in terms of the excited transition cross-section has been derived by using perturbation theory. The expression obtained is valid for any radiation spectral width and for various types of transition: bound-bound and bound-free. By way of illustration the excitation of a two-level system by an ultrashort pulse with a controlled carrier–envelope phase and the photoionization of a hydrogen atom under the action of a sequence of two-cycle electromagnetic pulses are considered.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 5, pp. 3–9, May, 2010.
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Astapenko, V.A. Calculation of the probability of photoprocesses induced by ultrashort electromagnetic pulses. Russ Phys J 53, 437–445 (2010). https://doi.org/10.1007/s11182-010-9440-z
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DOI: https://doi.org/10.1007/s11182-010-9440-z