Photo-Detached Electron Flux Distribution in a Gradient Electric Field*

Wang, Dehua; Tang, Tian-tian

doi:10.1088/0253-6102/63/5/591

Cited by 2 publications

(1 citation statement)

References 26 publications

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“…[29] Very recently, our group investigated the photo-detached electron flux distribution in a gradient electric field. [30] In the case of the photodetachment, the escaping electron is subjected only to the gradient electric field. The number of the electron trajectories from the ion to any point on the detector is limited.…”

Section: Introductionmentioning

confidence: 99%

Photoionization microscopy of Rydberg hydrogen atom in a non-uniform electrical field

Cheng¹,

Wang²,

Chen³

et al. 2016

Chinese Phys. B

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In this paper, we investigate the photoionization microscopy of the Rydberg hydrogen atom in a gradient electric field for the first time. The observed oscillatory patterns in the photoionization microscopy are explained within the framework of the semiclassical theory, which can be considered as a manifestation of interference between various electron trajectories arriving at a given point on the detector plane. In contrast with the photoionization microscopy in the uniform electric field, the trajectories of the ionized electron in the gradient electric field will become chaotic. An infinite set of different electron trajectories can arrive at a given point on the detector plane, which makes the interference pattern of the electron probability density distribution extremely complicated. Our calculation results suggest that the oscillatory pattern in the electron probability density distribution depends sensitively on the electric field gradient, the scaled energy and the position of the detector plane. Through our research, we predict that the interference pattern in the electron probability density distribution can be observed in an actual photoionization microscopy experiment once the external electric field strength and the position of the electron detector plane are reasonable. This study provides some references for the future experimental research on the photoionization microscopy of the Rydberg atom in the non-uniform external fields.

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Section: Introductionmentioning

confidence: 99%

Photoionization microscopy of Rydberg hydrogen atom in a non-uniform electrical field

Cheng¹,

Wang²,

Chen³

et al. 2016

Chinese Phys. B

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Study on the photodetachment wave packet dynamics of H- ion in a gradient electric field

Chen¹,

Wang²,

Cheng³

2015

Acta Phys. Sin.

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Using the combination of the time-dependent perturbation theory and the closed-orbit theory, we put forward a calculation formula for the autocorrelation function of H ion in a gradient electric field, and then calculate and analyze the autocorrelation function of the system. Especially, we discuss the effect of laser pulse width, electric field strength and the electric field gradient on the autocorrelation function of H ion in a gradient electric field. It is demonstrated that when the laser pulse width is very narrow, far less than the period of the detached electron, the quantum wave packet revival phenomenon is significant. A series of sharp reviving peaks appear in the autocorrelation function, which are caused by the interference between the returning electron wave packets travelling along the closed orbit and the outgoing electron wave packets. However, with the increase of laser pulse width, the quantum wave packet revival phenomenon becomes weakened. When the difference between the pulse width and the period of the closed orbit is not very large, the reviving peaks in the autocorrelation function become widely spread gradually and the oscillatory structures get flattened. This correspondence will vanish finally due to the interference between the adjacent peaks. In addition, our study also suggests that the background electric field strength and the electric field gradient in the gradient electric field can also have significant effects on the autocorrelation function. With the increase of background electric field strength and electric field gradient, the period of the detached electron's closed orbit gets shorter, the number of the revival peaks in the autocorrelation function is increased gradually, and the quantum wave packet revival phenomenon will be enhanced. Therefore, we can control the autocorrelation function of the hydrogen negative ion by changing the laser pulse width and the external electric field strength. Our results will provide some reference values for the experimental research on the wave packet dynamic property of atoms or ions in external fields.

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Photo-Detached Electron Flux Distribution in a Gradient Electric Field*

Cited by 2 publications

References 26 publications

Photoionization microscopy of Rydberg hydrogen atom in a non-uniform electrical field

Photoionization microscopy of Rydberg hydrogen atom in a non-uniform electrical field

Study on the photodetachment wave packet dynamics of H- ion in a gradient electric field

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