GaN量子点基于电磁感应透明的慢光效应

GaN量子点基于电磁感应透明的慢光效应 Slow Light in GaN Quantum Dot Based on Electromagnetically Induced Transparency 陈凤 CHEN Feng 1 first-author 姚端正 YAO Duanzheng 1 武汉大学物理科学与技术学院 武汉大学物理科学与技术学院 School of Physics and Technology,Wuhan University School of Physics and Technology,Wuhan University 通过分析介质的有效复极化率,研究了GaN球形量子点基于电磁感应透明（EIT）的慢光效应.分别用一带和六带有效质量理论计算了GaN量子点的能级结构,模拟了探测光的吸收谱、色散谱以及放慢因子随耦合光强的变化,并考虑了失相率和耦合光失谐对放慢因子的影响.研究结果表明,慢光因子存在最大值,取最大值时所对应的耦合光强与失相率相关,耦合光越强电磁感应透明现象越明显,耦合光失谐不影响放慢因子的大小. By analyzing the effective complex susceptibility of the medium we studied the slow light in GaN quantum dot based on the electromagnetically induced transparency.The energy structure of the quantum dot has been calculated by using one band and six band effective mass models and we have shown the variation of the absorption spectra and refractive index of the probe beam at different coupling powers.And the influence of the coupling power and dephasing rate to the slow-down factor,which exhibits an optimal coupling intensity for maximum slow-down factor at different cases,has been discussed.At last the effects of the coupling beam detuning on the slow light have been analyzed. 量子点 电磁感应透明 慢光 放慢因子 quantum dot electromagnetically induced transparency（EIT） slow light slow-down factor 10.14188/j.1671-8836.2013.03.017 O431.2 国家自然科学基金（51272185）资助项目 2013-03-01 2021-04-01 3 59