GHz Phononic Crystal Devices

GHz声子晶体器件该提案的目标是开发一类新的GHz纳米级声子晶体（PC）器件，这些器件将用于理解和设计纳米级低损耗声学材料的基本特性，展示声学功能，如隧穿，波导和多路复用以及合成小型化射频（RF）信号处理器，这些信号处理器用现有技术的微/纳机械（M/NEMS）谐振器。 智力优势：该提案的主要优点在于设计了一种变革性的声学设备，同时能够实现高Q值、直接匹配50 kHz和前所未有的功能，例如频率复用，其外形尺寸比目前使用RF组件的情况要小得多。 此外，该项目将通过开发实验工具来理解接近和高于声子弛豫时间的频率下的声子-声子相互作用，从而在基础物理学层面实现一些变革性的进步。更广泛的影响：PI将与费城当地高中一起参与组织教育活动，特别关注代表性不足的少数民族。 PI实验室和西费城学校之间的合作将使在PI实验室进行研究的高中生能够更多地了解尖端科学和技术。本科生将通过研究职位和夏季REU计划参与研究活动。 该项目所带来的基本发现将被纳入PI目前正在教授的研究生课程。 最后，PI计划通过在Penn Nanoday展示他的研究结果来吸引公众。

GHz PHONONIC CRYSTAL DEVICESAbstractObjective: This proposal targets the development of a new class of GHz nanoscale phononic crystal (PC) devices that will be employed to understand and engineer the fundamental properties of low loss acoustic materials at the nanoscale, demonstrate acoustic functionalities such as tunneling, waveguiding and multiplexing and synthesize miniaturized radio frequency (RF) signal processors that are not attainable with state-of-the-art micro/nano mechanical (M/NEMS) resonators. Intellectual Merit: The main merit of this proposal consists in devising a transformative class of acoustic devices simultaneously capable of high Q, direct matching to 50 Ù and unprecedented functionalities such as frequency multiplexing in a significantly reduced form factor than what is currently possible with RF components. Furthermore, the project will enable some transformative advancement at the fundamental physics level by developing experimental tools for the understanding of phonon-phonon interactions at frequencies close to and above the phonon relaxation time. Broader Impact: The PI will be involved in organizing educational activities with local high schools in Philadelphia, with special attention to underrepresented minorities. The collaborative effort between the PI's laboratory and the West Philadelphia schools will allow high school students doing research in the PI's laboratory to learn more about cutting-edge science and technology. Undergraduate students will be involved in research activities via research positions and summer REU programs. The fundamental discoveries enabled by this project will be included in the current graduate course the PI is teaching. Finally, the PI plans to involve the general public by presenting his research findings at the Penn Nanoday.