Wavelength- and ellipticity-dependent photoelectron spectra from multiphoton ionization of atoms

doi:10.1088/1674-1056/ac9b36

中国物理B ›› 2023, Vol. 32 ›› Issue (2): 23201-023201.doi: 10.1088/1674-1056/ac9b36

Wavelength- and ellipticity-dependent photoelectron spectra from multiphoton ionization of atoms

Keyu Guo(郭珂雨)¹, Min Li(黎敏)^1,†, Jintai Liang(梁锦台)¹, Chuanpeng Cao(曹传鹏)¹, Yueming Zhou(周月明)¹, and Peixiang Lu((陆培祥)^1,2

1 School of Physics and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China;
2 Optics Valley Laboratory, Wuhan 430074, China

收稿日期:2022-09-09 修回日期:2022-10-07 接受日期:2022-10-19 出版日期:2023-01-10 发布日期:2023-01-31
通讯作者: Min Li E-mail:mli@hust.edu.cn
基金资助:
Project supported by National Key Research and Development Program of China (Grant No. 2019YFA0308300) and the National Natural Science Foundation of China (Grant Nos. 12021004 and 61475055).

Wavelength- and ellipticity-dependent photoelectron spectra from multiphoton ionization of atoms

Keyu Guo(郭珂雨)¹, Min Li(黎敏)^1,†, Jintai Liang(梁锦台)¹, Chuanpeng Cao(曹传鹏)¹, Yueming Zhou(周月明)¹, and Peixiang Lu((陆培祥)^1,2

1 School of Physics and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China;
2 Optics Valley Laboratory, Wuhan 430074, China

Received:2022-09-09 Revised:2022-10-07 Accepted:2022-10-19 Online:2023-01-10 Published:2023-01-31
Contact: Min Li E-mail:mli@hust.edu.cn
Supported by:
Project supported by National Key Research and Development Program of China (Grant No. 2019YFA0308300) and the National Natural Science Foundation of China (Grant Nos. 12021004 and 61475055).

摘要/Abstract

摘要： We theoretically study the photoelectron momentum distributions from multiphoton ionization of a model lithium atom over a range of laser wavelengths from 500 nm to 700 nm by numerically solving the time-dependent Schrödinger equation. The photoelectron momentum distributions display many ring-like patterns for the three-photon ionization, which vary dramatically with the change of the laser wavelength. We show that the wavelength-dependent photoelectron energy spectrum can be used to effectively identify the resonant and nonresonant ionization pathways. We also find an abnormal ellipticity dependence of the electron yield for the (2+1) resonance-enhanced ionization via the 4d intermediate state, which is relevant to the two-photon excitation probability from the ground state to the 4d state.

关键词: multiphoton ionization, ultrafast phenomena, Freeman resonance

Abstract: We theoretically study the photoelectron momentum distributions from multiphoton ionization of a model lithium atom over a range of laser wavelengths from 500 nm to 700 nm by numerically solving the time-dependent Schrödinger equation. The photoelectron momentum distributions display many ring-like patterns for the three-photon ionization, which vary dramatically with the change of the laser wavelength. We show that the wavelength-dependent photoelectron energy spectrum can be used to effectively identify the resonant and nonresonant ionization pathways. We also find an abnormal ellipticity dependence of the electron yield for the (2+1) resonance-enhanced ionization via the 4d intermediate state, which is relevant to the two-photon excitation probability from the ground state to the 4d state.

Key words: multiphoton ionization, ultrafast phenomena, Freeman resonance

中图分类号: (Photoionization and excitation)

32.80.-t

33.80.Rv (Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states)) 32.80.Rm (Multiphoton ionization and excitation to highly excited states)

Keyu Guo(郭珂雨), Min Li(黎敏), Jintai Liang(梁锦台), Chuanpeng Cao(曹传鹏), Yueming Zhou(周月明), and Peixiang Lu((陆培祥). Wavelength- and ellipticity-dependent photoelectron spectra from multiphoton ionization of atoms[J]. 中国物理B, 2023, 32(2): 23201-023201.

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Wavelength- and ellipticity-dependent photoelectron spectra from multiphoton ionization of atoms

Wavelength- and ellipticity-dependent photoelectron spectra from multiphoton ionization of atoms

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