Materials World Network: Understanding and Controlling Optical Excitations in Individual Hybrid Nanostructures

材料世界网络：理解和控制单个混合纳米结构中的光激发

• 批准号: 1008107
• 负责人: Gregory Salamo
• 金额: $ 16.4万
• 依托单位: University of Arkansas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-08-15 至 2014-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1008107&HistoricalAwards=false
• 关键词: Materials; World; Network; Understanding; Controlling

This Materials World Network project focuses on exploring the fundamental mechanisms governing the optical excitations of two specific hybrid material systems of common interest, namely (1) quantum-dot/quantum-well coupled via tunneling and (2) metal/semiconductor coupled via their exciton-plasmon resonance. The goal is to establish the relationships between structure and function in these systems that will create new knowledge with impact on plasmonic and quantum dot lasers, biosensors, and energy conversion. The core innovation lies in fabrication, optical probing and simulation of novel nanoscale hybrid structures and architectures whose geometrical parameters can be systematically tuned. To accomplish this goal requires a concerted effort in nanofabrication, coherent optical spectroscopy and theoretical modeling that is provided by an international collaboration between an American and German research team. The US team consists of researchers at the University of Arkansas who are partners with the University of Oklahoma in an NSF-supported Materials Research Science and Engineering Center. This team is especially talented in the growth by molecular beam epitaxy, characterization by scanning tunneling microscopy, and the characterization of the optical behavior of nanostructures and the interactions between them. The German team consists of researchers at the Institut für Physik, at the University of Oldenburg, who have many years of experience in the development and application of ultrafast and nanoscale optical spectroscopy tools to study the coherent optical behavior of nanostructures. Together, both teams have the experience, talent, and infrastructure needed to develop a detailed microscopic understanding of the interactions between the elementary optical excitations of a semiconductor quantum dot, or exciton, and the elementary optical excitation of a metal nanoparticle (MNP), or surface plasmon polariton, as well as the coherent and incoherent resonant coupling between a single quantum dot and quantum well. Student exchange will also play a significant part of the collaborative effort to accomplish the research goals. For example, students will spend one to two months each year with their international partner pursuing and advancing the understanding of the coupling in hybrid nanostructures and their corresponding thesis research. Since students will eventually work in a global market there is no better preparation for international collaboration. In addition, by working with a team on an international scale there is a new dimension added to student teamwork, requiring students to handle collaboration that is remote, cross-cultural, and linguistically challenging. Students will also be the central element in an aggressive outreach plan to both K-12 American and German students. Their participation will further provide an opportunity for the sharing of cultures.

该材料世界网络项目重点探索控制共同感兴趣的两种特定混合材料系统的光学激发的基本机制，即（1）通过隧道耦合的量子点/量子阱和（2）通过激子-等离子体共振耦合的金属/半导体。目标是建立这些系统中结构和功能之间的关系，从而创造对等离子体和量子点激光器、生物传感器和能量转换产生影响的新知识。核心创新在于新型纳米级混合结构和架构的制造、光学探测和模拟，其几何参数可以系统地调整。为了实现这一目标，需要美国和德国研究团队之间的国际合作提供纳米加工、相干光谱学和理论建模方面的共同努力。美国团队由阿肯色大学的研究人员组成，他们与俄克拉荷马大学在国家科学基金会支持的材料研究科学与工程中心合作。该团队在分子束外延生长、扫描隧道显微镜表征以及纳米结构光学行为及其相互作用的表征方面尤其有才华。德国团队由奥尔登堡大学物理研究所的研究人员组成，他们在超快和纳米级光学光谱工具的开发和应用以研究纳米结构的相干光学行为方面拥有多年的经验。两个团队共同拥有所需的经验、人才和基础设施，可以详细了解半导体量子点（或激子）的基本光学激发与金属纳米粒子（MNP）或表面等离子体激元极化子的基本光学激发之间的相互作用，以及单个量子点和量子之间的相干和非相干共振耦合。 出色地。学生交换也将在实现研究目标的合作努力中发挥重要作用。例如，学生每年将花一到两个月的时间与国际合作伙伴一起追求和推进对混合纳米结构耦合及其相应论文研究的理解。由于学生最终将在全球市场工作，因此没有更好的国际合作准备。此外，通过与国际范围内的团队合作，学生的团队合作增加了一个新的维度，要求学生处理远程、跨文化和语言挑战的协作。学生也将成为面向 K-12 美国和德国学生的积极外展计划的核心要素。 他们的参与将进一步提供文化共享的机会。