Photodetachment of negative ion in a gradient electric field near a metal surface

doi:10.1088/1674-1056/21/4/043401

中国物理B ›› 2012, Vol. 21 ›› Issue (4): 43401-043401.doi: 10.1088/1674-1056/21/4/043401

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

刘天启,王德华,韩才,刘江,梁东起,解思成

收稿日期:2011-07-13 修回日期:2011-08-19 出版日期:2012-02-29 发布日期:2012-02-29
通讯作者: 王德华, E-mail:jnwdh@sohu.com E-mail:jnwdh@sohu.com

Photodetachment of negative ion in a gradient electric field near a metal surface

Liu Tian-Qi (刘天启),Wang De-Hua (王德华),Han Cai (韩才),Liu Jiang (刘江),Liang Dong-Qi (梁东起),Xie Si-Cheng (解思成)

School of Physics, Ludong University, Yantai 264025, China

Received:2011-07-13 Revised:2011-08-19 Online:2012-02-29 Published:2012-02-29
Contact: Wang De-Hua, E-mail:jnwdh@sohu.com E-mail:jnwdh@sohu.com
Supported by:
Project supported by the National Natural Science Foundation of China(Grant Nos.11074104 and 10604045),the Higher Education Science and Technology Program of Shandong Province,China(Grant No.J09LA02),and the University Student’s Science and Technology Innovation Fund of Ludong University,China(Grant No.10g003)

摘要/Abstract

Abstract: Based on closed-orbit theory, the photodetachment of H^- in a gradient electric field near a metal surface is studied. It is demonstrated that the gradient electric field has a significant influence on the photodetachment of negative ions near a metal surface. With the increase of the gradient of the electric field, the oscillation in the photodetachment cross section becomes strengthened. Besides, in contrast to the photodetachment of H^- near a metal surface in a uniform electric field, the oscillating amplitude and the oscillating region in the cross section of a gradient electric field also become enlarged. Therefore, we can use the gradient electric field to control the photodetachment of negative ions near a metal surface. We hope that our results will be useful for understanding the photodetachment of negative ions in the vicinity of surfaces, cavities, and ion traps.

Key words: photodetachment, metal surface, gradient electric field, closed orbit theory

中图分类号: (Interactions of atoms and molecules with surfaces)

34.35.+a

32.80.Gc (Photodetachment of atomic negative ions) 32.80.Qk (Coherent control of atomic interactions with photons) 42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)

刘天启,王德华,韩才,刘江,梁东起,解思成. [J]. 中国物理B, 2012, 21(4): 43401-043401.

Liu Tian-Qi (刘天启),Wang De-Hua (王德华),Han Cai (韩才),Liu Jiang (刘江),Liang Dong-Qi (梁东起),Xie Si-Cheng (解思成). Photodetachment of negative ion in a gradient electric field near a metal surface[J]. Chin. Phys. B, 2012, 21(4): 43401-043401.

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Photodetachment of negative ion in a gradient electric field near a metal surface

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