Collaborative Research: Signal Processing Devices Based on Spin-Torque Nano-Oscillators

协作研究：基于自旋扭矩纳米振荡器的信号处理设备最近在理解纳米结构中电流感应磁化动力学方面的突破导致了一种新型的微波自旋扭矩纳米振荡器的出现。这一合作研究计划的目标是创建实验原型，并开发基于自旋扭矩纳米振荡器的两种新型微波信号处理设备的工作原理：(I)超高速宽带频谱分析仪；(Ii)片上微波信号调制器。所提出的器件基于一种新的振荡器几何结构，具有两个自由？磁层。在这种几何结构中，自由层以彼此相反的方向前进，从而使所产生的微波信号的频率加倍。这种新颖的几何结构将为基于振荡器的器件的发展铺平道路，工作频率高达80千兆赫。该计划的另一个目标是研究开发的纳米设备之间进行片上和芯片间无线通信的可能性，这将使它们能够在没有高阻、低功率效率的电线互连的情况下交换和处理微波信号。智力优势：拟议的研究计划将对微波纳米自旋电子学领域产生革命性影响，并将导致具有无线通信能力的纳米尺寸片上微波信号处理设备的新概念的开发。这一变革性概念的发展可能会改变系统工程师对将单个纳米级设备集成到纳米自旋电子集成电路中的看法。这项研究还将促进我们对磁性纳米结构中自旋极化电流和动态磁化强度之间相互作用的物理理解。方法是充分利用加州大学欧文分校的实验小组和奥克兰大学的理论小组之间协同互动的全部好处。这一合作努力将通过与美国和欧洲领先的研究小组以及与国内领先的工业合作伙伴的互动来加强，以实现微波纳米自旋电子器件技术开发的突破。更广泛的影响：他提出的研究计划将以多种方式影响社会。该计划开发的新型微波片上纳米级信号处理设备将有助于保持美国在微波电子领域的领先地位。许多本科生和研究生将接触到纳米科学和纳米技术的现代方法，并将与国内外领先的研究小组以及我们的产业合作伙伴进行互动。拟议中的计划将为美国电子和磁记录行业培养有价值的专家，这些行业目前正在经历从微米到纳米的快速过渡，并将加强美国的研究基础设施。针对博士后研究人员的特殊指导计划，教育他们撰写研究提案并组织合作研究，将为我们未来的独立科学生涯准备博士后。外展活动(为K-12教师和学生量身定做的纳米科学和纳米技术讲座和演示)将有助于培养熟练的劳动力和了解科学知识的公众。由于计划参与者将纳米技术的理论和实验方法纳入研究生和本科生的大学课程，拟议的计划还将对教育产生重大影响。

Collaborative Research: Signal Processing Devices Based on Spin-Torque Nano-Oscillators Recent breakthroughs in understanding of current-induced magnetization dynamics in nano-structures have led to the emergence of a new type of microwave spin-torque nano-oscillatorssources. The goal of this collaborative research program is to create experimental prototypes and develop a theory of operation of two novel microwave signal-processing devices that are based on spin-torque nano-oscillators : (i) ultra-fast broadband spectrum analyzer;(ii) on-chip microwave signal modulator. The proposed devices are based on a new oscillator geometry with two ?free? magnetic layers. In this geometry, the free layers precess in directions opposite to each other, thus doubling the frequency of the generated microwave signal. This novel geometry will pave the way towards the development of oscillator-based devices with operation frequency of up to 80 gigahertz. Another goal of this program is to research the possibilities for wireless on-chip and chip-to-chip communications between the developed nano-sized devices, that will allow them to exchange and process microwave signals without high-resistance power-inefficient wire interconnects. Intellectual merit: The proposed research program will have a transformative impact on the field of microwave nano-spintronics, and will lead to the development of a new concept of nano-sized on-chip microwave signal processing devices with wireless communication capabilities. The development of this transformative concept could change the way system engineers think about integration of individual nano-scale devices into nano-spintronic integrated circuits. The proposed research will also advance our understanding of the physics of interactions between spin-polarized currents and dynamic magnetization in magnetic nanostructures. The approach is to use the full benefit of synergistic interaction between the experimental group at the University of California, Irvine and the theoretical group at the Oakland University. This collaborative effort will be enhanced by interactions with leading US and European research groups, and with leading domestic industrial partners to achieve a breakthrough in the development of device technology for microwave nano-spintronics. Broader impacts: he proposed research program will impact society in multiple ways. The new types of microwave on-chip nano-scale signal processing devices developed in this program will help maintain US leadership in microwave electronics. A number of undergraduate and graduate students will be exposed to the modern methods of nanoscience and nanotechnology, and will interact with the leading foreign and domestic research groups, as well as with our industrial partners. The proposed program will prepare valuable specialists for the US electronics and magnetic recording industries that are currently undergoing a rapid transition from the micro- to the nano-scale, and will enhance the US research infrastructure. A special mentoring program for post-doctoral researchers, educating them on writing research proposals and organizing collaborative research, will prepare our postdocs for the future independent scientific careers. The outreach activities (lectures and demonstrations on nanoscience and nanotechnology tailored for K-12 teachers and students) will contribute to the development of skilled workforce and scientifically informed public. The proposed program will also create a strong impact on education as a result of incorporating theoretical and experimental methods of nanotechnology into the graduate and undergraduate university curricula by the program participants.