CAREER: Non-Local Metamaterials and Metasurfaces for Next Generation Non-Reciprocal Acoustic Devices

职业：下一代非互易声学器件的非局域超材料和超表面

• 批准号: 2340782
• 负责人: Christopher Sugino
• 金额: $ 65.01万
• 依托单位: Stevens Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-06-01 至 2029-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2340782&HistoricalAwards=false
• 关键词: CAREER; Non; Local; Metamaterials; Metasurfaces

This Faculty Early Career Development (CAREER) award will fund research that enables acoustic metamaterials and metasurfaces leveraging non-local unit cell interactions. The non-reciprocal acoustic devices will enable independent modification of transmitted and reflected waves, with transformative impact in applications such as biomedical ultrasound, ultrasonic imaging, underwater communication, and the design of aerospace structures, thereby promoting the progress of science. This research will establish a novel class of metamaterials and metasurfaces whose constituent unit cells can interact non-locally and implement arbitrary non-reciprocal (i.e., asymmetric) wave behaviors, fundamentally expanding the possibilities for acoustic wave manipulation. These non-local systems achieve non-reciprocal acoustic behaviors in a simpler way than existing methods, shifting the paradigm for how acoustic waves can be used to solve engineering problems. The educational component of the project will focus on the creative manipulation of sound, introducing concepts of noise and vibration control from the research component of the project, to increase student participation in STEM and acoustics. In collaboration with the Stevens Teaching and Learning Center, the project will initiate an “Acoustics Day” outreach program hosted in the Stevens anechoic chamber. The program will host middle school students from the local area, emphasizing the connections between sound, urban environments, and different engineering careers. This research aims to enable complete control over acoustic waves by investigating non-local acoustic metamaterials and metasurfaces that break acoustic reciprocity. Unlike local, phase-delayed interactions, non-local interactions can have a directional bias, resulting in broken symmetry and non-reciprocal behavior. Conventional materials do not interact non-locally; instead, this project will build upon research in acoustic metamaterials and metasurfaces, which use a small-scale repeated unit cell to manipulate wave propagation, reflection, and transmission. This project will shift the paradigm of conventional acoustic metamaterials and metasurfaces through a comprehensive theoretical and experimental investigation of non-local acoustic metamaterials and metasurfaces, leveraging piezoelectric transducers that interact non-locally via electrical circuitry. The results of this research will unlock new types of acoustic phenomena, provide fundamental insight into non-Hermitian physics, and initiate new research directions in acoustic circuits that freely manipulate acoustic waves.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.

该学院早期职业发展（CAREER）奖将资助利用非局部晶胞相互作用的声学超材料和超表面的研究。非互易声学设备将能够独立修改传输波和反射波，对生物医学等应用产生变革性影响。这项研究将建立一类新型的超材料和超表面，其组成单元可以非局域相互作用并实现任意功能。非互易（即不对称）波行为，从根本上扩展了声波操纵的可能性，这些非局部系统以比现有方法更简单的方式实现非互易声学行为，改变了声波的使用范式。该项目的教育部分将侧重于声音的创造性操纵，从该项目的研究部分引入噪声和振动控制的概念，以增加学生对 STEM 和声学的参与。学习中心、项目将启动在史蒂文斯消声室举办的“声学日”推广计划 该计划将接待当地的中学生，强调声音、城市环境和不同工程职业之间的联系。通过研究破坏声学互易性的非局部声学超材料和超表面来研究声波，与局部相位延迟相互作用不同，非局部相互作用可能具有方向性偏差，从而导致对称性破坏和非互易行为。传统材料不会发生非局部相互作用；相反，该项目将建立在声学超材料和超表面的研究基础上，使用小规模重复晶胞来操纵波传播、反射和传输。该项目将改变传统的范例。通过对非局域声学超材料和超表面的全面理论和实验研究，利用通过电路进行非局域交互的压电换能器，研究声学超材料和超表面。这项研究的结果将解锁新型声学现象，提供对非厄米物理学的基本见解，并在自由操纵声波的声学电路方面开创新的研究方向。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。