Photodetachment of H− near two perpendicular metal surfaces

The electron flux distributions in the photodetachment of HF− near an interface are studied using a two-center model and the theoretical imaging method. An analytical expression for electron flux distributions is derived, which displays oscillations on an observation plane similar to the recent results published by Wang but in the presence of a static electric field. We also discuss the expressions for soft and hard wall cases in detail. A comparison is made with the previous work. The expression is a more general result, and we can deduce from it the electron flux distributions for the photodetachment of H−2 near an interface. Finally, we show that the expression reveals similar results as those in [Chin. Phys. B 19 020306 (2010)] when the wall effect is neglected.

Section: Introductionmentioning

confidence: 99%

Electron flux distributions in photodetachment of HF⁻near an interface: Theoretical imaging method study

Awan¹,

Afaq²

2013

“…Since the closed orbit theory provides a clear physical description of the classical movement and oscillatory structures of the detached electron in the photodetachment cross section of a negative ion, many researchers have used this the-ory to study the photodetachments of H − in different external fields, such as in parallel electric and magnetic fields, crossed electric and magnetic fields, and electric and magnetic fields with arbitrary orientations. [10][11][12][13][14][15][16][17][18][19][20][21][22] Recently, with the development of surface physics, the closed orbit theory has been used to study the photodetachments of negative ions near surfaces. In 2006-2007, Yang, [23,24] Wang, [25] and Afaq and Du [26] applied the closed orbit theory to study the photodetachment of H − near an elastic interface.…”

Section: Introductionmentioning

confidence: 99%

Control of the photodetachment of H ⁻ near a metallic sphere surface by an elastic interface

Li¹,

Wang²

2014

Self Cite

According to the closed-orbit theory, we study the influence of elastic interface on the photodetachment of H − near a metallic sphere surface. First, we give a clear physical description of the detached electron movement between the elastic interface and the metallic sphere surface. Then we put forward an analytical formula for calculating the photodetachment cross section of this system. Our study suggests that the photodetachment cross section of H − is changed with the distance between the elastic interface and H − . Compared with the photodetachment cross section of H − near a metallic sphere surface without the elastic interface, the cross section of our system oscillates and its oscillation is strengthened with the decrease of the distance from the elastic interface to H − . In additon, our calcuation results suggest that the influence of the elastic interface becomes much more significant when it is located in the lower half space rather than in the upper half space. Therefore, we can control the photodetachment of H − near a metallic sphere surface by changing the position of the elastic interface. We hope that our work is conducive to the understanding of the photodetachment process of negative ions near interfaces, cavities and ion traps.

“…[4,10] Recently, with the development of the surface physics, closed orbit theory has been used to study the photodetachment of the negative ion near surfaces. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] In 2006-2007, Yang et al, [11,12] Wang, [13] and Afag and Du [14] used the closed orbit theory to study the photodetachment of H − near an elastic interface. Later, the photodetachment of H − near metal surfaces was studied.…”

Section: Introductionmentioning

confidence: 99%

“…Later, the photodetachment of H − near metal surfaces was studied. [15][16][17][18][19][20][21][22][23][24][25] Very recently, Zhao and Du [26] studied the photodetachment of H − in an open wedge cavity. In these previous studies, they all studied the photodetachment of a negative ion near surfaces or inside an open cavity.…”

Section: Introductionmentioning

confidence: 99%

Photodetachment of hydrogen negative ion inside a circular microcavity

Wang¹,

Liu²,

Li³

et al. 2013

Self Cite

The photodetachment of a hydrogen negative ion inside a circular microcavity is studied based on the semiclassical closed orbit theory. The closed orbit of the photo-detached electron in a circular microcavity is investigated and the photodetachment cross section of this system is calculated. The calculation result suggests that oscillating structure appears in the photodetachment cross section, which is caused by the interference effects of the returning electron waves with the outgoing waves traveling along the closed orbits. Besides, our study suggests that the photodetachment cross section of the negative ions depends on the laser polarization sensitively. In order to show the correspondence between the cross section and the closed orbits of the detached electron clearly, we calculate the Fourier transformation of the cross section and find that each peak corresponds to the length of one closed orbit. We hope that our results will be useful for understanding the photodetachment process of negative ions or the electron transport in a microcavity.