The impact of nonessential states in near-resonant two-photon ionization of hydrogen
ORAL
Abstract
By numerically solving the three-dimensional time-dependent Schrodinger equation, two-photon ionization of hydrogen is investigated at the near-resonant frequencies of the 1s-2p transition. Due to the Rabi oscillations between the 1s and 2p states, the photoelectron energy spectrum exhibits the Autler-Townes (AT) doublet and we focus on its spectral characteristics. Developing a minimal three-level model that is fully supported by the accurate 3D TDSE simulations, we demonstrate the role of the ac Stark shifts and the nonresonant ionization pathway in the energy splitting, asymmetry and angular distribution of the lower and higher energy peaks of the AT doublet. Furthermore, we show how these spectral features can be controlled with the actual choice of the laser parameters (Phys. Rev. A 106, 063114, 2022).
*Supported by the Janos Bolyai Research Scholarship (BO/00474/22/11) of the Hungarian Academy of Sciences and the UNKP-22-5 New National Excellence Program of the Ministry for Culture and Innovation from the source of the National Research, Development, and Innovation Fund.
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Publication: [1] Xu Zhang, Yueming Zhou, Yijie Liao, Yongkun Chen, Jintai Liang, Qinghua Ke, Min Li, Andras Csehi, and Peixiang Lu, Phys. Rev. A 106, 063114 (2022).
[2] Attila Toth and Andras Csehi, J. Phys. B: At. Mol. Opt. Phys. 54, 035005 (2021).
Presenters
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Andras Csehi
- University of Debrecen