光学学报, 2019, 39 (12): 1223002, 网络出版: 2019-12-06  

非对称高斯势二能级体系的跃迁频率和自发辐射率 下载: 650次

Transition Frequency and Spontaneous Emission Rate in the Asymmetric Gaussian Potential Two-Level System
作者单位
河北科技师范学院凝聚态物理研究所, 河北 秦皇岛 066004
摘要
采用Pekar变分法研究了双参量非对称高斯势二能级体系中电子态的概率密度、跃迁频率及体纵光学声子自发辐射率,并讨论了其单参量抛物势近似。数值结果表明:选用双参量非对称高斯势描写量子点中电子的受限效应能够更恰当地反映电子态的波动性、电子运动的统计规律性及声子自发辐射率的量子化特性,而其单参量抛物势近似给出的结果较为简单和粗糙。材料的色散及电声耦合对二能级体系中电子态的概率分布、量子跃迁频率和体纵光学声子自发辐射率的影响不能忽略。
Abstract
The probability density, the transition frequency and the longitudinal optical (LO) phonon spontaneous emission rate of electronic states in the two-parameter asymmetric Gaussian (AG) potential two-level system are studied by using the Pekar variational method, and their single-parameter parabolic potential approximation are discussed. Numerical results show that the selecting the two-parameter AG potential to describe the restricted effects of electron in quantum dot can more accurately reveal the quantization characteristics of the wave property of electronic states, the statistical regularity of electron motion and the LO phonons spontaneous emission rate, and the results given by the single parametric parabolic approximation are relatively sample and rough. The influence of dispersion and electron-phonon coupling of materials on the probability distribution, quantum transition frequency and the LO spontaneous emission rate in the two-level system cannot be ignored.

辛伟, 尹洪武, 额尔敦朝鲁. 非对称高斯势二能级体系的跃迁频率和自发辐射率[J]. 光学学报, 2019, 39(12): 1223002. Wei Xin, Hongwu Yin, 额尔敦朝鲁. Transition Frequency and Spontaneous Emission Rate in the Asymmetric Gaussian Potential Two-Level System[J]. Acta Optica Sinica, 2019, 39(12): 1223002.

引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!