Signatures of tunneling and multiphoton ionization by short-laser pulses: The partial-wave distribution

29th International Conference on Photonic, Electronic, and Atomic Collisions

Arbó, Diego G.^1 ; Lemell, Christoph^2 ; Burgdörfer, Joachim^2

Institute for Astronomy and Space Physics, IAFE, CC 67, Suc. 28, Buenos Aires

1428, Argentina^1

Institute for Theoretical Physics, Vienna University of Technology, Wiedner Hauptstraße 8-10/136, Vienna

A-1040, Austria^2

关键词: Energy dependent;    Energy distributions;    Keldysh parameter;    Multiphoton ionization;    Quantum-classical correspondence;    Short laser pulse;    Strong-field approximations;    Tunneling ionization;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/1/012003/pdf
DOI  :  10.1088/1742-6596/635/1/012003

来源: IOP

【 摘 要 】

We analyze the two-dimensional angular momentum-energy distribution of electrons emitted from argon by short laser pulses. We identify characteristic features of both multiphoton and tunneling ionization in the partial-wave distribution for Keldysh parameters close to unity. We observe a remarkable degree of quantum-classical correspondence in the photoinization process which becomes even more pronounced after intensity averaging over the focal volume. We derive an energy-dependent cut-off for the highest angular momentum accessible within the framework of the strong-field approximation, which accurately reproduces the partial wave distributions found from solutions of the time-dependent Schrödinger equation.