EAGER: Ultra-High Frequency Phononic Devices

EAGER：超高频声子器件

• 批准号: 1549911
• 负责人: Agisilaos Iliadis
• 金额: $ 15万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-08-01 至 2018-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1549911&HistoricalAwards=false
• 关键词: EAGER; Ultra; Frequency; Phononic; Devices

Surface acoustic wave propagation through engineered "phononic" crystal lattices was shown by theoretical and experimental evaluations to result in exciting new properties with "pass" and "stop" frequency bands, fractional wavelength propagation, mode hopping and high frequency resonances. The theoretical and experimental research on the propagation of surface acoustic waves through these lattices can be controlled by the size and geometry of the unit cell of these engineered structures. Yet, most of the work has been limited to moderate frequencies at megahertz ranges. Fundamentally, these structures can reach ultra-high frequency ranges through scaling down and design. This EAGER project proposes to study the problem of increasing the frequency of operation to ultra-high frequencies of such surface acoustic wave structures by developing a novel nanostructured phononic lattice device and exploring its properties. Furthermore, a novel fully integrated surface acoustic wave-phononic lattice device is proposed that has the potential to provide unique acoustic wave logic functions. The potential benefits of this research can be transformational in the electronics industry as a new family of acoustic wave devices can be developed with unique properties in the ultra-high frequency, and digital switching domain, with a host of key applications, such as superlensing imaging at fractional wavelengths, ultra-high frequency acoustic resonance filters for secure communications, switching phononic logic elements, ultra-sensitive sensing and others. The fundamental understanding of these structures will advance substantially the field of acoustic wave propagation and generation and will allow incorporation of such research in most electronics text books that will benefit student development. In societal needs it is anticipated to have a tremendous impact through applications in ultra-high frequency secure communications, acoustic logic elements, superlensing acoustic imaging for airport security, ultra-high sensitivity sensors, that are critical to societal needs for home, hospitals, institutions, airports, schools and vehicle safety. The goal of the project is to explore and develop a novel family of ultra-high frequency acoustic nanodevices based on phononic lattices of self-assembeled nanostructured thin films with different unit cell size and geometry. Three key innovative approaches will be introduced and employed for this project (a) the development of the self-assembly of piezoelectric nanostructures for the phononic lattice with the study of its fundamental acoustic wave properties, (b) the development and study of the surface acoustic wave inputs and outputs for the nanostructured phononic lattice, and (c) the integration of the nano-phononic lattice with inputs and outputs for an active acoustic wave logic element. The project will design for fundamental frequencies f0 in the gigahertz range and and study upconversion through fractional wavelength and scaling-down to sub-terahertz ranges. The proposed novel approach to developing a new family of acoustic nanodevices will explore the properties of the nano-phononic lattices theoretically and experimentally, explore frequency upconversion, mode hopping to higher frequency optical branches, and higher order resonances through the phononic lattice for ultra-high frequency applications.The proposed research focuses on introducing and exploring new concepts in phononic device development for ultra high frequency performance and unique capabilities for active switching that has a potentially transformative impact on integrated acoustic devices and circuits.

通过工程“声子”晶格的表面声波传播的理论和实验评估表明，导致令人兴奋的新性能与“通”和“停止”频带，分数波长传播，模式跳跃和高频共振。声表面波在这些晶格中传播的理论和实验研究可以通过这些工程结构的晶胞的尺寸和几何形状来控制。然而，大多数工作仅限于兆赫范围内的中等频率。从根本上说，这些结构可以通过按比例缩小和设计达到超高频范围。这个EAGER项目提出通过开发新型纳米结构声子晶格器件并探索其特性来研究将这种表面声波结构的操作频率提高到超高频的问题。此外，还提出了一种新型的完全集成的表面声波-声子晶格器件，该器件有可能提供独特的声波逻辑功能。这项研究的潜在好处可以在电子工业中实现变革，因为可以开发一种新的声波器件家族，其在超高频和数字开关领域具有独特的特性，具有许多关键应用，例如分数波长的超透镜成像，用于安全通信的超高频声学谐振滤波器，开关声子逻辑元件，超灵敏传感器等。对这些结构的基本理解将大大推进声波传播和生成领域，并将允许将此类研究纳入大多数电子教科书中，这将有利于学生的发展。在社会需求方面，预计它将通过超高频安全通信，声学逻辑元件，机场安全的超透镜声学成像，超高灵敏度传感器等应用产生巨大影响，这些应用对家庭，医院，机构，机场，学校和车辆安全的社会需求至关重要。该项目的目标是探索和开发一种新型的超高频声学纳米器件，该器件基于具有不同晶胞尺寸和几何形状的自组装纳米结构薄膜的声子晶格。本项目将引入和采用三种关键的创新方法：（a）开发声子晶格的压电纳米结构的自组装及其基本声波特性的研究，（B）开发和研究纳米结构声子晶格的表面声波输入和输出，以及（c）纳米声子晶格与有源声波逻辑元件的输入和输出的集成。该项目将设计千兆赫范围内的基频f0，并研究通过分数波长和缩小到亚太赫兹范围的上转换。所提出的开发新的声学纳米器件家族的新方法将从理论和实验上探索纳米声子晶格的性质，探索频率上转换，跳模到更高频率的光学分支，和高阶共振通过声子晶格的超-高频应用。拟议的研究重点是介绍和探索超高频声子器件开发的新概念，这是一种高性能和独特的有源开关功能，对集成声学器件和电路具有潜在的变革性影响。