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Two-photon excitation of atoms by ultrashort electromagnetic pulses in a discrete spectrum |
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| Authors: | V A Astapenko S V Sakhno |
| Affiliation: | 1. Department of Radio Engineering and Cybernetics, Moscow Institute of Physics and Technology (State University), Dolgoprudnyi, Russiaastval@mail.ru;3. Department of Radio Engineering and Cybernetics, Moscow Institute of Physics and Technology (State University), Dolgoprudnyi, Russia |
| Abstract: | AbstractThe paper is devoted to the theoretical investigation of two-photon excitation of atom in a discrete energy spectrum by ultrashort electromagnetic pulses of femto- and subfemtosecond ranges of durations. An analytical expression for the total probability of the process is derived. Numerical simulations are made for hydrogen and sodium atoms. It is shown that the total probability of the process is nonlinear function of pulse duration and character of this function depends strongly on the frequency detuning of pulse carrier frequency from two-photon resonance. |
| Keywords: | Ultrashort pulse two-photon excitation hydrogen atom |