Control of photoionization by resonant phase-locked pulse pairs

• URL: http://arxiv.org/abs/2510.09441v1
• Date: Fri, 10 Oct 2025 14:52:31 GMT
• Title: Control of photoionization by resonant phase-locked pulse pairs
• Authors: Edvin Olofsson, Evan Lovelle Fulton, Rezvan Tahouri, Mattias Bertolino, Jean Marcel Ngoko Djiokap, Jan Marcus Dahlström,
• Abstract summary: We study the nonlinear and resonant process of two-photon ionization of atoms in a pump-probe scheme.<n>We show how it is possible to coherently control the dressed-state population during the probe pulse.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We study the nonlinear and resonant process of two-photon ionization of atoms (He and H) in a pump-probe scheme. The pump pulse prepares the quantum system in a superposition of the ground state and an excited bound state. By varying the phase difference between the pulses, we show how it is possible to coherently control the dressed-state population during the probe pulse. Our main result is that for certain laser parameters, the control over the dressed state population leads to strong control of the ionization probability during the probe pulse. The effect arises due to one of the dressed states becoming stabilized against ionization. Contrasting effects from circular and linear polarized pulses demonstrate how such ``bound states in the continuum'' are sensitive to the degeneracy of the coupled continuum.

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