Abstract:
Optics of unipolar half-cycle light pulses has been a rapidly developing area of modern physics in recent years. Such pulses have various interesting applications, since they allow ultrafast control of the properties of a medium and ultrafast attosecond switching of the state of a medium. When such pulses collide in a medium, a spatial distribution of the population difference of the energy levels of the medium arises, which is a dynamic microresonator with Bragg-like mirrors in the form of lattices of atomic populations. In this paper, based on the numerical solution of the system of material equations for the density matrix of a three-level medium together with the wave equation, the dynamics of microresonators in collisions of half-cycle attosecond pulses in a medium is studied depending on the polarity of the pulses. It is shown that the shape of the induced microresonators differs significantly from each other when the colliding pulses have the same and opposite polarities. It is demonstrated that this dynamics is qualitatively similar to the dynamics of these structures in a two-level medium, previously studied by the authors.
Keywords:extremely short pulses, attosecond pulses, dynamic microresonators.
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