CAREER: Engineering of III-Nitride Quantum Heterostructures Doped with Lanthanides

技术支持：该CAREER奖的研究部分是研究掺杂稀土离子的III族氮化物材料的低维量子结构。该研究包括使用光学，电学，磁学和压力刺激，综合建模，以及分子束外延和脉冲激光沉积生长与其他科学家合作和关闭俄亥俄州大学校园的材料表征。稀土离子与III-N基质之间的能量传递过程和稀土离子缺陷的形成及其性质是影响该材料系统量子效率、铁磁性和电子输运的主要因素。该项目研究了显着增加辐射量子产额的方法。策略，如修改的稀土离子中心环境，通过工程应力/应变参数在材料生长过程中，和本地化的载流子在附近的发射稀土离子中心，通过使用量子结构，被采用。该项目研究了影响发光、能量激发过程和稀土杂质的局部位置对称性的基本原子水平机制和现象，以及合成和材料加工。非技术性：该项目涉及具有高技术相关性的材料科学主题领域的基础研究问题。新材料的开发对半导体工业的未来需求很重要。该项目如果成功，将对光子学的发展产生影响。该项目的研究和教育活动是一体化的。教育活动的中心主题是在俄亥俄州大学的PI部门开发光子课程。新的光子课程和实验室旨在让本科生和研究生积极参与解决现实世界的问题。此外，该项目的外联部分为中学和工程预科学生提供智力机会和激励。

Technical: The research component of this CAREER award is to study low-dimensional quantum structures of group-III nitride materials doped with rare-earth ions. The research includes materials characterization using optical, electrical, magnetic, and pressure stimulus, comprehensive modeling, as well as molecular beam epitaxy and pulsed-laser deposition growth in collaboration with other scientists on and off the Ohio University campus. The energy transfer processes between rare-earth ions and III-N hosts and rare-earth ion-defects formation and their nature are the main factors contributing to the quantum efficiency, ferromagnetism, and electronic transport of this materials system. The project investigates approaches to significantly increase radiative quantum yield. Strategies such as modification of the rare-earth ion center environment, through engineering stress/strain parameters during the materials growth process, and localization of carriers in the vicinity of emitting rare-earth ion center, by using quantum structures, are employed. The fundamental atomic level mechanisms and phenomena coupled with synthesis and material processing affecting luminescence, energy excitation processes, and local site symmetry of rare-earth impurities are studied in the project.Non-technical: The project addresses basic research issues in a topical area of materials science with high technological relevance. The development of new materials is important to the future needs of semiconductor industries. The project, if successful, can have impacts on the advancement of photonics. The research and education activities of the project are integrated. The central theme of the education activities is to develop photonic curriculum in the PI's department at Ohio University. New photonic courses and laboratories are designed to allow active engagement of undergraduate and graduate students in solving real-world problems. In addition, the outreach component of the project provides intellectual opportunities and stimulation for secondary school and pre-engineering students.