Collaborative Research: Implementing Topologically Protected Gigahertz Acoustic Circuits

合作研究：实现拓扑保护的千兆赫声电路

• 批准号: 2221326
• 负责人: Alan Johnson
• 金额: $ 30万
• 依托单位: University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-15 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2221326&HistoricalAwards=false
• 关键词: Collaborative; Research; Implementing; Topologically; Protected

Microwave acoustic devices are widely used in wireless communication technology and quantum information science. This NSF project aims to realize acoustic devices with lower propagation loss than traditionally engineered circuits. The project will bring transformative change to the design and characterization of low-loss acoustic systems operating in the gigahertz regime. This will be achieved by implementing the acoustic analogues of topological electronic states and characterizing them with network analysis and microwave microscopy. The intellectual merits of the project include (1) design of acoustic devices with nontrivial topology, (2) simulation of acoustic transport in complex structures, (3) fabrication of advanced microwave circuits, and (4) nanoscale visualization of wave propagation on piezoelectric membranes. The broader impacts of the project include (1) implementation of practical devices for wireless communication applications, (2) integrated research and education programs in both institutions for optimal training and learning experience, (3) outreach to local high-school students and teachers with a strong focus on underrepresented/minority groups, and (4) promoting the effectiveness of local summer camps for K-12 students.In the Ultra High Frequency and Super High Frequency regime, conventional acoustic devices suffer from narrow bandwidth and high propagation loss. Drawing inspiration from condensed matter physics, it is possible to design topologically nontrivial phononic systems, where acoustic waves can propagate without being backscattered. Due to the challenge in fabrication and the lack of appropriate characterization tools, however, acoustic topological metamaterials are mostly demonstrated with kilohertz to megahertz operating frequencies. This NSF project aims to implement gigahertz acoustic integrated circuits with topologically protected phononic transport by combining theoretical analysis, numerical simulation, device fabrication, and nanoscale visualization. In particular, the direct information on nanoscale acoustic fields is expected be crucial for the inspection and refinement of novel microwave circuitry. Such a design-validation loop will expedite the prototyping of acoustic elements such as waveguides, delay lines, dividers/combiners, resonators, frequency division multiplexer, and filters based on quantum valley Hall, quantum spin Hall, or quantum-Hall-like effects. Integrated research and education programs at both institutions will be established so that students are trained to master modern nanofabrication techniques, state-of-the-art microwave acoustic systems, and scanning probe microscopy. The research teams will outreach to local high school students and teachers through lab experience, Saturday workshop, and summer camps. The active involvement in frontier research will influence their career path towards STEM fields.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

微波声音设备广泛用于无线通信技术和量子信息科学。这个NSF项目旨在实现比传统工程电路低的传播损失的声学设备。该项目将使在Gigahertz制度中运行的低损失声学系统的设计和表征带来变革性的变化。这将通过实施拓扑电子状态的声学类似物并通过网络分析和微波显微镜来实现。该项目的智力优点包括（1）设计具有非平凡拓扑的声学设备，（2）复杂结构中的声传输的模拟，（3）制造高级微波电路，以及（4）在压电膜上的波浪传播的纳米级可视化。该项目的更广泛的影响包括（1）实施无线沟通应用的实用设备，（2）在这两个机构中的综合研究和教育计划，用于最佳培训和学习经验，（3）向当地的高中生和老师提供强烈专注于代表性不足/少数派/少数派的高中生，以及（4）在当地的频繁的频繁的频率和频繁的频繁的频率和高级训练性的频率。设备遭受狭窄的带宽和高繁殖损失。从冷凝物质物理学中汲取灵感，可以设计拓扑非平凡的语音系统，在那里声波可以传播而不会反向散射。然而，由于制造挑战和缺乏适当的表征工具，声学拓扑的超材料主要用Kilohertz证明了Megahertz的运行频率。该NSF项目旨在通过结合理论分析，数值模拟，设备制造和纳米级可视化来实现与拓扑保护的语音传输的Gigahertz声学整合电路。特别是，有关纳米级声场的直接信息预计对于新型微波电路的检查和完善至关重要。这样的设计验证环将加快基于量子谷霍尔，量子旋转厅或量子霍尔的效果的声音元素的原型制作，例如波导，延迟线，分隔线/组合器，谐振器，频施加多路复用器和过滤器。将建立两个机构的综合研究和教育计划，以便对学生进行培训，以掌握现代纳米制造技术，最先进的微波声学系统和扫描探针显微镜。研究团队将通过实验室经验，周六研讨会和夏令营向当地高中生和老师揭开展览。该奖项反映了NSF的法定任务，并被认为值得通过基金会的知识分子优点和更广泛的审查标准来评估。