闪锌矿GaN/Al_(0.15)Ga_(0.85)N量子点的光学特性  

Optical Properties of Cubic GaN/Al_(0.15)Ga_(0.85)N Quantum Dots

作　　者：吴花蕊[1] 李在林[1] 

机构地区：[1]新乡学院物理系,河南新乡453003

出　　处：《新乡学院学报》2011年第1期25-27,共3页Journal of Xinxiang University

基　　金：河南省教育厅自然科学研究基金(2009B140006)

摘　　要：在有效质量近似条件下,利用变分法计算了量子点高度对GaN/AlGaN量子点光学性质的影响。研究了激子结合能、量子点发光波长、电子-空穴复合率随量子点高度的变化关系。数据结果表明量子点高度对激子结合能、量子点发光波长、电子-空穴复合率有着重要的影响,激子效应将使量子点发光波长红移。Based on the framework of effective-mass approximation and variational approach,the optical properties of cubic GaN/Al0.15Ga0.85N quantum dots were investigated theoretically.Considering the three-dimensional confinement of electron and hole,the exciton binding energy,the emission wavelength and the oscillator strength were calculated as function of the dot height L.The results indicate that the dot height L has a significant influence on the exciton binding energy,the emission wavelength and the electron-hole recombination.Furthermore,exciton effect will make the emission wavelength increase.

关 键 词：闪锌矿量子点 发光波长 电子-空穴复合率 激子结合能 激子效应 

分 类 号：O472[理学—半导体物理]