纤锌矿ZnO基量子阱中电子-声子相互作用和内建电场对电子态能级和结合能的影响

项目名称： 纤锌矿ZnO基量子阱中电子-声子相互作用和内建电场对电子态能级和结合能的影响

项目编号： No.11264027

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 赵凤岐

作者单位： 内蒙古师范大学

项目金额： 51万元

中文摘要： 针对纤锌矿ZnO基量子阱材料的发光、光吸收和声子传播的特殊性质进行理论研究，集中考虑纤锌矿ZnO基量子阱材料单轴异性、电子与多支光学声子耦合、晶格失配引起的压电极化和晶格结构非对称导致的自发极化共同激发的内建电场作用，同时还考虑多声子跃迁和构成量子阱材料的三元混晶中晶格振动的"双模性"。经过讨论和分析纤锌矿ZnO基量子阱材料中光学声子传播属性，获得对电子-光学声子相互作用的正确认识。理论计算纤锌矿ZnO基量子阱中极化子、杂质态、激子态等的能量、跃迁能量和结合能，弄清单轴异性、电子-光学声子相互作用、内建电场和外加电磁场等因素对上述量子阱中电子态能量、跃迁能量和结合能的影响，给出新的理论结果。力求用理论来解释近期喇曼散射实验现象，预言新现象，将进一步推动本领域的实验和理论工作，为光散射、发光和光吸收提供理论依据，为新物理现象的探索和新型电子器件研制提供有参考价值的理论知识。

中文关键词： 纤锌矿ZnO基量子阱；电子-声子相互作用；内建电场；电子态；能级

英文摘要： The special properties of the wurtzite ZnO-based quantum well luminescence and phonon transmission are studied. The uniaxial anisotropy of quantum well, electronic and multi-branches optical phonon coupling, the built-in electric field effect excited by piezoelectric polarization caused by lattice mismatch and spontaneous polarization led by asymmetrical lattice structure are considered in the research. Meanwhile, the multi-phonon transitions and the dual-module of lattice vibrations in the ternary mixed crystal that is the composition of quantum well are also considered. After the discussion and analysis of propagation properties of optical phonon in the wurtzite ZnO-based quantum well, a correct understanding of the interaction of electron - optical phonon will be got. The energy levels and the binding energy of polaron，impurity states，excited state et al in the wurtzite ZnO-based quantum well is calculated theoretically. The influences on the electronic states and the binding energy in the quantum well has some influences of the uniaxial anisotropy, electronics-optical phonon interaction, built-in electric field and the external electromagnetic field on the energy levels and the binding energy of electronic states in the quantum well is clarified. And the new theoretical results are given. The theory will be

英文关键词： ZnO-based quantum well；electron-phonon interaction；build-in electric field；electron state；energy levels