Abstract
We investigate a two-photon ionization process in a real hydrogen atom by short and intense chirped laser pulses. Our simulation of the laser-atom interaction consists on numerically solving the three-dimensional time-dependent Schrodinger equation with a spectral method. The unperturbed wave functions and electronic energies of the atomic system were found by using an accurate L2 discretisation technique based on the expansion of the wave functions on B-spline functions. We show the efficiency of chirped laser pulses to control the ionization yield and the transfer of the population to the 2p bound state involved in the ionization path.
Highlights
Thanks to the rapid advances in laser technology, laser pulses are becoming increasingly shorter and intense which make them an adequate tool to probe the ultrafast dynamics in atoms and molecules [1,2,3,4,5]
We show the efficiency of chirped laser pulses to control the ionization yield and the transfer of the population to the 2p bound state involved in the ionization path
We show the efficiency of the chirped laser pulses to control the ionization yield in a real hydrogen atom
Summary
Thanks to the rapid advances in laser technology, laser pulses are becoming increasingly shorter and intense which make them an adequate tool to probe the ultrafast dynamics in atoms and molecules [1,2,3,4,5]. There is an increasing interest to investigate the interaction of atoms and molecules with chirped laser pulses [10,11,12,13,14]. These pulses that are frequency modulated have an advantage over unchirped laser pulses, i.e., transform-limited laser pulses. Their characterization and shaping make them more tailored to achieve complete electronic population inversion in molecular systems [15] and induce resonant multiphoton population transfer in Rydberg atoms [16,17,18,19,20]. Atomic units me e 1 a.u. are used throughout the paper unless otherwise mentioned
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