CAREER: Semiconductor Nanowire Quantum Heterostructures: Growth, Characterization, and Quantum Confined Properties and Photonics at the Nanoscale

0644737智力优点：本职业计划的目标是合成和研究从分子到微观长度尺度的自组装纳米线异质结构材料的光学特性。对光学器件中量子效应的基本理解和利用，有望彻底改变纳米光子系统。该研究将侧重于纳米线异质结构和器件在不同的几何形状的合成和表征，精确控制组成和尺寸，以研究在有限的几何形状系统的基本光学特性。本论文的主要研究方向为：1）发展原子层沉积技术来合成奈米异质结构。2)利用电子显微镜、光学、电学与光电量测来表征奈米异质结构。3)量子限制奈米线光子元件如二极体、雷射及单光子源之制造。拟议的研究跨越了科学和工程的几个前沿，主要集中在研究化学生长的纳米线异质结构的光学特性，其中有限的尺寸，表面和量子效应成为主导。这将导致新的亚光刻纳米光子器件的发展，这是很难组装使用传统的技术，包括光子元件与硅基电子集成。更广泛的影响：拟议中的研究将极大地影响纳米光子学领域，这是引领纳米技术时代的主要驱动力。自下而上的自组装纳米结构方法将创建高效的纳米系统，其功能是任何传统技术都不可能实现的。集成的纳米光子学/电子学将允许开发新的、更便宜和有效的设备，这些设备将影响电信、计算、诊断和传感器等领域。该提案教育计划的主要重点是开发创新的教学工具，使各级学生都能获得高质量的科学教育。PI将通过以下方式整合研究活动和教育目标：1）在宾夕法尼亚大学材料科学系开发纳米科学新课程。2)本科生，代表性不足的群体和少数民族参与研究计划。3)发展科学货车项目，将科学设备和实验带到费城西部设备不足的高中。

0644737Intellectual Merit: The objective of this CAREER proposal is to synthesize and study the optical properties of self-assembled nanowire heterostructure materials ranging from molecular to microscopic length scales. Fundamental understanding and exploitation of quantum effects in optical devices holds great promise to revolutionize nanophotonic systems. The research will focus on the synthesis and characterization of nanowire heterostructures and devices in different geometries with accurate control over composition and dimension for investigating fundamental optical properties of systems in confined geometries. The following approach will be undertaken: 1) Develop the atomic-layer deposition technique to synthesize nanowire heterostructures. 2) Characterization of nanowire heterostructures using electron microscopy, optical, electrical, and optoelectronic measurements. 3) Fabrication of quantum-confined nanowire photonic devices such as diodes, lasers, and single-photon sources. The proposed research extends across several frontiers of science and engineering, with the main focus on studying optical properties of chemically grown nanowire heterostructures where finite size, surface and quantum effects become predominant. It will lead to the development of new sub-lithographic nanophotonic devices, which are difficult to assemble using conventional techniques including integration of photonic components with Si-based electronics. Broader Impact: The proposed research will greatly impact the field of nanophotonics, which represents a major driver ushering the era of nanotechnology. Bottom up approach to self assemble nanostructures will create highly efficient nanosystems with functionalities not possible with any conventional technology. Integrated nanophotonics/electronics will allow development of new, cheaper and efficient devices that will impact areas such as telecommunications, computing, diagnostics, and sensors. The main focus of the educational plan of this proposal is to develop innovative teaching tools to enable students at all levels to acquire high-quality scientific education. The PI will integrate research activities and educational goals by: 1) Developing a new curriculum in nanosciences in the Materials Science department at Penn. 2) Involvement of undergraduates, underrepresented groups and minorities in the research program. 3) Develop Science Van project to take scientific equipment and experiments to under-equipped high schools in West Philadelphia.