Photodetachment of H- near a hard wall with arbitrary laser polarization direction

doi:10.1088/1674-1056/24/8/083201

中国物理B ›› 2015, Vol. 24 ›› Issue (8): 83201-083201.doi: 10.1088/1674-1056/24/8/083201

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Photodetachment of H^- near a hard wall with arbitrary laser polarization direction

Azmat Iqbal^a, A. Afaq^b

a Department of Physics, COMSATS Institute of Information Technology, Lahore-54590, Pakistan;
b Centre of Excellence in Solid State Physics, University of the Punjab, New Campus, Lahore-54590, Pakistan

收稿日期:2014-11-07 修回日期:2015-03-04 出版日期:2015-08-05 发布日期:2015-08-05

Photodetachment of H^- near a hard wall with arbitrary laser polarization direction

Azmat Iqbal^a, A. Afaq^b

a Department of Physics, COMSATS Institute of Information Technology, Lahore-54590, Pakistan;
b Centre of Excellence in Solid State Physics, University of the Punjab, New Campus, Lahore-54590, Pakistan

Received:2014-11-07 Revised:2015-03-04 Online:2015-08-05 Published:2015-08-05
Contact: Azmat Iqbal E-mail:azmatiqbal786@gmail.com

摘要/Abstract

摘要： The photodetachment of H^- near a hard wall is investigated with linear polarized laser light travelling in arbitrary direction θ_L with respect to the z axis. An analytical formula for the total cross section is derived using semi-classical closed orbit theory, which consists of two terms, i.e., the smooth background term and the oscillatory term with an extra factor 2(θ_L). This factor controls oscillations in the total photodetachment cross section. The amplitude of oscillation is maximum at θ_L=0 when the laser polarization direction is perpendicular to the wall and it approaches zero at θ_L=π/2 when the laser polarization direction is parallel to the wall. It is also observed that the total cross section depends on the source–wall distance and it reduces to a free space case when the wall is at infinite distance from the source.

关键词: quantum interference, photodetachment process, hard wall, closed orbit theory

Abstract: The photodetachment of H^- near a hard wall is investigated with linear polarized laser light travelling in arbitrary direction θ_L with respect to the z axis. An analytical formula for the total cross section is derived using semi-classical closed orbit theory, which consists of two terms, i.e., the smooth background term and the oscillatory term with an extra factor 2(θ_L). This factor controls oscillations in the total photodetachment cross section. The amplitude of oscillation is maximum at θ_L=0 when the laser polarization direction is perpendicular to the wall and it approaches zero at θ_L=π/2 when the laser polarization direction is parallel to the wall. It is also observed that the total cross section depends on the source–wall distance and it reduces to a free space case when the wall is at infinite distance from the source.

Key words: quantum interference, photodetachment process, hard wall, closed orbit theory

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

32.80.Gc

03.65.Sq (Semiclassical theories and applications) 68.65.Fg (Quantum wells) 32.60.+i (Zeeman and Stark effects)

Azmat Iqbal, A. Afaq. Photodetachment of H^- near a hard wall with arbitrary laser polarization direction[J]. 中国物理B, 2015, 24(8): 83201-083201.

Azmat Iqbal, A. Afaq. Photodetachment of H^- near a hard wall with arbitrary laser polarization direction[J]. Chin. Phys. B, 2015, 24(8): 83201-083201.

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Photodetachment of H^- near a hard wall with arbitrary laser polarization direction

Photodetachment of H^- near a hard wall with arbitrary laser polarization direction

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