DE-HUA WANG^1,* , ZHAO-HANG CHEN¹, SHAO-HAO CHENG¹

Abstract

The photodetachment of hydrogen negative ion confined in a magnetic circular nano-cavity is studied on the basis of the semiclassical closed orbit theory. Firstly, we study the classical movement and find out the closed orbit of the photodetached electron. For each closed orbit, we calculate some geometric parameters like the length, action and amplitude, etc. Using these geometric parameters, we construct the semiclassical wave function of the detached electron. Then we put forward an analytical formula for calculating the photodetachment cross section of this system. Our calculation results suggest due to the interference effects of the returning electron waves traveling along the closed orbit with the outgoing waves, oscillating structure appears in the photodetachment cross section. In addition, our study suggests that the oscillating structure depends on the magnetic field strength and the radius of the nano-cavity sensitively. Our work can provide some reference value for the study of the magnetic ion trap and will be useful in understanding the photodetachment process of negative ions confined in a microcavity in the presence of external fields..

Keywords

Photodetachment, Confined negative ion, Magnetic field, Circular nano-cavity, Semiclassical theory, Cross section.

Submitted at: June 6, 2014
Accepted at: March 19, 2015

Citation

DE-HUA WANG, ZHAO-HANG CHEN, SHAO-HAO CHENG, Photodetachment of hydrogen negative ion confined in a magnetic circular nano-cavity, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 3-4, pp. 328-336 (2015)

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