MRI: Acquisition of a Molecular Beam Epitaxy Chamber for Quantum-Engineered Structures and Devices

MRI：获取用于量子工程结构和器件的分子束外延室

• 批准号: 1229678
• 负责人: Michael Santos
• 金额: $ 81.3万
• 依托单位: University of Oklahoma Norman Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1229678&HistoricalAwards=false
• 关键词: MRI; Acquisition; Molecular; Beam; Epitaxy

This award to the University of Oklahoma is for the acquisition of a state-of-the-art molecular beam epitaxy chamber to accelerate progress in developing a wide range of scientific and technologically important applications for materials containing antimony (Sb). Antimonide materials typically display a relatively narrow band gap, small effective electronic mass, and strong spin-orbit coupling. Interband cascade structures based on the type-II transition between InAs and GaSb quantum wells will be further developed for applications as mid-infrared lasers, photodetectors, and thermophotovoltaic devices. Quantum-dot structures with antimonide compounds as the material for either the dots or the matrix are candidates for solar cells that exploit intermediate band absorption or multi-exciton generation. Exploitation of strong-spin orbit coupling and confinement effects may lead to a new three-dimensional topological insulator in quantum-confined Sb films. Improved InSb quantum-well structures will facilitate further studies of electron spin effects and may enable formation of novel topological superconductor states. The effects of dilute amounts of nitrogen in narrow gap materials will be studied for photovoltaic and photodetector applications. The molecular beam epitaxy chamber will be used for the training of students in contemporary growth techniques and will create new research opportunities for students studying physics and engineering. Nanotechnology outreach to K-12 students, middle and high school teachers, undergraduates, and senior citizens will be enriched by the enhanced expertise that will result from the acquisition of a new chamber for antimonide growth.

该奖项授予俄克拉荷马大学是为了获得最先进的分子束外延室，以加速进步，以开发针对含有锑（SB）材料的广泛科学和技术重要的应用。 抗氨基盐材料通常显示相对狭窄的带隙，较小的有效电子质量和强的自旋轨道耦合。 基于INAS和GASB量子井之间的II型转变，将进一步开发用于应用中型激光器，光电探测器和热伏洛尔电型设备的应用。 量子点结构带有抗氧化剂化合物作为点或基质的材料是利用中间带吸收或多种外激体生成的太阳能电池的候选物。强旋转轨道耦合和限制效应的剥削可能会导致量子限制的SB膜中新的三维拓扑绝缘子。 改进的INSB量子孔结构将促进对电子自旋效应的进一步研究，并可能形成新型的拓扑超导体状态。 将研究狭窄间隙材料中稀释量的氮量的影响，以进行光伏和光电探测器应用。分子束外延室将用于培训当代增长技术的学生，并将为学习物理和工程学的学生创造新的研究机会。纳米技术向K-12学生，中学和高中教师，本科生和老年人的宣传将受到增强的专业知识的丰富，这将是由于收购新的抗氧化药物增长室而造成的。