Interference effect of photoionization of hydrogen atoms by ultra-short and ultra-fast high-frequency chirped pulses

doi:10.1088/1674-1056/28/8/083403

Abstract The photoionization of a hydrogen atom from its ground state with ultra-fast chirped pulses is investigated by numerically solving the time-dependent Schrödinger equation within length, velocity, and Kramers-Henneberger gauges. Converged results for all gauges for chirp-free pulses agree with the prediction of dynamic interference for ground state hydrogen atoms predicted recently by Jiang and Burgdörfer[Opt. Express 26, 19921 (2018)]. In addition, we investigated photoelectron spectra of hydrogen atoms by chirped laser pulses, and showed that dynamic interference effect will be weaken for pulses with increasing linear chirp. Our numerical results can be understood and discussed in terms of an interplay of photoelectron wavepackets from first and second halves of laser enevelop, including the ac Stark energy level shift of the photoelectron final state and atomic stabilization effect at ultra-high intensities.

Keywords: dynamic interference super-intense laser chirped pulses

Received: 17 May 2019
Revised: 13 June 2019
Accepted manuscript online:

PACS:	34.80.Qb	(Laser-modified scattering)
	34.80.Dp	(Atomic excitation and ionization)
	32.80.Wr	(Other multiphoton processes)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11774131 and 91850114).

Corresponding Authors: Aihua Liu
E-mail: aihualiu@jlu.edu.cn

Cite this article:

Ningyue Wang(王宁月), Aihua Liu(刘爱华) Interference effect of photoionization of hydrogen atoms by ultra-short and ultra-fast high-frequency chirped pulses 2019 Chin. Phys. B 28 083403

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Interference effect of photoionization of hydrogen atoms by ultra-short and ultra-fast high-frequency chirped pulses

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