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Semiclassical study on photodetachment of hydrogen negative ion in a harmonic potential confined by a quantum well
Zeitschrift für Naturforschung A ( IF 1.8 ) Pub Date : 2021-05-01 , DOI: 10.1515/zna-2020-0350
De-hua Wang 1
Affiliation  

We have studied the photodetachment dynamics of the H − ion in a harmonic potential confined in a quantum well for the first time. The closed orbits of the detached electron in a confined harmonic potential are found and the photodetachment spectra of this system are calculated. It is interesting to find that the photodetachment spectra depend sensitively on the size of the quantum well and the harmonic frequency. For smaller size of the quantum well, the harmonic potential can be considered as a perturbation, the interference effect between the returning electron wave bounced back by the quantum well and the initial outgoing wave is very strong, which makes the photodetachment spectra exhibits an irregular saw-tooth structure. With the increase of the size of the quantum well, the photodetachment spectra oscillates complicatedly in the higher energy region. For very large size of the quantum well, the photodetachment spectra approach to the case in a free harmonic potential, which is a regular saw-tooth structure. In addition, the harmonic frequency can also affect the photodetachment spectra of this system greatly. Our work provides a new method for the study of spatially confined low-dimensional systems and may guide the future experimental research for the photodetachment dynamics in the ion trap.

中文翻译:

氢原子在量子阱限制下的谐波势中光解的半经典研究

我们首次研究了限制在量子阱中的谐波势中H-离子的光解动力学。在有限的谐波势中找到离析电子的闭合轨道,并计算该系统的光解谱。有趣的是,光解离光谱敏感地取决于量子阱的大小和谐波频率。对于较小尺寸的量子阱,可以将谐波电势视为一种扰动,量子阱反弹回来的返回电子波与初始出射波之间的干涉效应非常强,这使得光解谱呈现出不规则的锯齿。 -牙齿结构。随着量子阱尺寸的增加,光解离光谱在较高的能量区域内复杂地振荡。对于非常大的量子阱,光解谱在自由谐波电势下接近该情况,这是一种常规的锯齿形结构。另外,谐波频率也会极大地影响该系统的光解谱。我们的工作为研究空间受限的低维系统提供了一种新方法,并可能为离子阱中光解离动力学的未来实验研究提供指导。
更新日期:2021-04-30
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