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

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

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.

Keywords: photodetachment metal surface gradient electric field closed orbit theory

Received: 13 July 2011
Revised: 19 August 2011
Accepted manuscript online:

PACS:	34.35.+a	(Interactions of atoms and molecules with surfaces)
	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)

Fund: 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)

Corresponding Authors: Wang De-Hua, E-mail:jnwdh@sohu.com
E-mail: jnwdh@sohu.com

Cite this article:

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 2012 Chin. Phys. B 21 043401

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

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