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

智力优势：本项目的目标是合成和研究从分子尺度到微观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，为纳米光子系统的革命带来了巨大的希望。研究将集中在不同几何形状的纳米线异质结构和器件的合成和表征上，并精确控制组成和尺寸，以研究受限几何形状系统的基本光学性质。研究方向：1)发展原子层沉积技术合成纳米线异质结构。2)利用电子显微镜、光学、电学和光电子测量表征纳米线异质结构。3)制造量子限制的纳米线光子器件，如二极管、激光器和单光子源。这项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性质，其中有限尺寸、表面和量子效应成为主要因素。这将导致新的亚光刻纳米光子器件的发展，这些器件很难用传统的技术组装，包括光子元件与硅基电子元件的集成。更广泛的影响：提议的研究将极大地影响纳米光子学领域，它代表了引领纳米技术时代的主要驱动力。自底向上的自组装纳米结构方法将创造出高效的纳米系统，其功能是任何传统技术都无法实现的。集成纳米光子学/电子学将允许开发新的、更便宜和高效的设备，这些设备将影响诸如电信、计算、诊断和传感器等领域。本提案教育计划的主要重点是开发创新的教学工具，使各级学生获得高质量的科学教育。该项目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)让本科生、未被充分代表的群体和少数族裔参与研究项目。3)开发科学车项目，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.