The influence of interface modifier on photodetachment of negative ions in an electric field near a metal surface

doi:10.1088/1674-1056/20/7/073201

中国物理B ›› 2011, Vol. 20 ›› Issue (7): 73201-073201.doi: 10.1088/1674-1056/20/7/073201

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

The influence of interface modifier on photodetachment of negative ions in an electric field near a metal surface

黄凯云, 王德华

School of Physics, Ludong University, Yantai 264039, China

收稿日期:2010-12-06 修回日期:2011-02-16 出版日期:2011-07-15 发布日期:2011-07-15

The influence of interface modifier on photodetachment of negative ions in an electric field near a metal surface

Huang Kai-Yun(黄凯云) and Wang De-Hua(王德华)^†

School of Physics, Ludong University, Yantai 264039, China

Received:2010-12-06 Revised:2011-02-16 Online:2011-07-15 Published:2011-07-15

摘要/Abstract

摘要： Based on closed-orbit theory, the influence of an interface modifier on the photodetachment of H^- in an electric field near a metal surface is studied. It is demonstrated that the interface strengthens the oscillations in the photodetachment cross section. However, when the electric field environments are different, the strengthening oscillations are caused by different sources. When the electric field direction is upward, the interface enhances the oscillations by shortening the period and the action of the closed orbit. When the electric field direction is downward, the interface strengthens the oscillations either by extending the coherent energy range or by increasing the total number of the closed orbits. We hope that our results will be conducive to the understanding of the photodetachment process of negative ions near interfaces, cavities and ion traps.

Abstract: Based on closed-orbit theory, the influence of an interface modifier on the photodetachment of H^- in an electric field near a metal surface is studied. It is demonstrated that the interface strengthens the oscillations in the photodetachment cross section. However, when the electric field environments are different, the strengthening oscillations are caused by different sources. When the electric field direction is upward, the interface enhances the oscillations by shortening the period and the action of the closed orbit. When the electric field direction is downward, the interface strengthens the oscillations either by extending the coherent energy range or by increasing the total number of the closed orbits. We hope that our results will be conducive to the understanding of the photodetachment process of negative ions near interfaces, cavities and ion traps.

Key words: photodetachment, interface, closed orbit theory

中图分类号: (Photodetachment of atomic negative ions)

32.80.Gc

32.80.Qk (Coherent control of atomic interactions with photons) 03.65.Sq (Semiclassical theories and applications)

黄凯云, 王德华. The influence of interface modifier on photodetachment of negative ions in an electric field near a metal surface[J]. 中国物理B, 2011, 20(7): 73201-073201.

Huang Kai-Yun(黄凯云) and Wang De-Hua(王德华). The influence of interface modifier on photodetachment of negative ions in an electric field near a metal surface[J]. Chin. Phys. B, 2011, 20(7): 73201-073201.

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The influence of interface modifier on photodetachment of negative ions in an electric field near a metal surface

The influence of interface modifier on photodetachment of negative ions in an electric field near a metal surface

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