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

职业：掺杂镧系元素的 III 族氮化物量子异质结构的工程

• 批准号: 1056493
• 负责人: Wojciech Jadwisienczak
• 金额: $ 44.4万
• 依托单位: Ohio University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-04-01 至 2018-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1056493&HistoricalAwards=false
• 关键词: CAREER; Engineering; III; Nitride; Quantum

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.

技术：本CAREER奖的研究部分是研究稀土离子掺杂的iii族氮化物材料的低维量子结构。该研究包括使用光学、电、磁和压力刺激的材料表征，综合建模，以及分子束外延和脉冲激光沉积生长，与俄亥俄大学校园内外的其他科学家合作。稀土离子与III-N基体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体系量子效率、铁磁性和电子输运的主要因素。该项目研究了显著提高辐射量子产率的方法。通过材料生长过程中的工程应力/应变参数来改变稀土离子中心环境，利用量子结构将发射稀土离子中心附近的载流子局部化等策略被采用。本项目研究了影响稀土杂质发光、能量激发过程和局域位对称性的基本原子水平机制和现象，并结合合成和材料加工进行了研究。非技术：该项目涉及材料科学主题领域的基础研究问题，具有高技术相关性。新材料的开发对半导体工业的未来需求非常重要。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大学PI系开发光子课程。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，该项目的外展部分为中学和工程预科学生提供智力机会和刺激。