Resonant Generation of Few-Cycle Pulses
in Hydrogenlike Atoms¹

Y. V. Radeonychev^{a, b, *}, V. A. Polovinkin^{a, b}, and O. A. Kocharovskaya^{b, a}

^a Institute of Applied Physics of the Russian Academy of Science, ul. Ulyanova 46, Nizhni Novgorod, 603950 Russia

^b Department of Physics of Texas A&M University, College Station, 77843-4242 TX, USA

*e-mail: radion@appl.sci-nnov.ru

Received October 31, 2011; in final form, February 4, 2012; published online September 3, 2012

Abstract—We show the possibility to produce nearly bandwidth-limited few-cycle pulses based on time-
dependent resonant interaction of an incident radiation with the bound states of hydrogenlike atoms. A time-
dependence of an atomic resonance is provided by far-off-resonant laser field with intensity much below the
atomic ionization threshold via time-dependent tunnel ionization from the excited states and temporal adiabatic
Stark splitting of the excited energy levels. Without external synchronization of the spectral components it is
possible to produce a train of two-cycle pulses at 121.6 nm with duration 800 as in atomic hydrogen.

DOI: 10.1134/S1054660X12100192

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