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Exploration of Dynamically Reconfigurable Topological Insulators for Enabling Next-Generation Acoustic-Based Logic and Signal Processing

探索动态可重构拓扑绝缘体以实现下一代基于声学的逻辑和信号处理

基本信息

批准号：
1929849
负责人：
Michael Leamy
金额：
$ 42.87万
依托单位：
Georgia Tech Research Corporation
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-08-15 至 2023-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1929849&HistoricalAwards=false
关键词：
Exploration Dynamically Reconfigurable Topological Insulators

项目摘要

This project will contribute to the progress of science and advance the national health, security and prosperity, by producing new knowledge on dynamically reconfigurable topological insulators. The topological insulators are materials with unique properties that allow signals to travel through their edges, but not the surface. Outcomes of this project will contribute to the advancement of reconfigurable topological insulators technologies. These technologies have a number of applications in communication devices, sensors and robotics, including cellular phones, touch screens, and microfluidic devices. Educational outreach is planned to underrepresented high school students and their teachers through the Georgia Intern Fellowships for Teachers (GIFT) program, while recruitment of new graduate students will include reaching out to several Historically Black Colleges and Universities (HBCUs) local to Atlanta. Findings from the research, together with educational outreach, will inform the scientific community and a large and diverse cohort of students about new discoveries in the physics of waves and electromechanical systems, which is expected to inspire the next generation of scientists and engineers.Topological insulators represent a new class of materials in which the bulk material behaves as an insulator (i.e., prevents wave propagation), while the periphery allows such propagation (e.g., edge propagation or interface propagation). Furthermore, due to topological protection, these edge modes are protected from backscattering, and are therefore intrinsically protected from the presence of defects and imperfections. This research will demonstrate the first reconfigurable, mechanical topological insulators through the use of theoretical, computational, and experimental techniques. Concepts to be explored include mechanical means of reconfigurability using solenoids and piezoelectric actuation. Both means will break inversion symmetry, resulting in a separation of the material's Dirac structure, yielding non-trivial Chern numbers (an integer measure of topology) and thus topological insulators. This is anticipated to open pathways to new classes of commercially viable waveguides, filters, and logic devices immune to back-scattering from defects and anomalies. Much like ubiquitous surface acoustic wave (SAW) devices, these new devices are expected to have advantages over their electromagnetic counterparts in terms of size and cost, and are expected to be more efficient (e.g., consume less battery power) than software solutions such as digital signal processing.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.

该项目将通过产生动态可重构拓扑绝缘体的新知识，为科学进步和促进国家健康，安全和繁荣做出贡献。拓扑绝缘体是具有独特性质的材料，允许信号通过其边缘而不是表面传播。该项目的成果将有助于可重构拓扑绝缘体技术的进步。这些技术在通信设备、传感器和机器人中有许多应用，包括蜂窝电话、触摸屏和微流体设备。计划通过格鲁吉亚实习教师奖学金（GIFT）计划向代表性不足的高中学生及其教师进行教育推广，而新研究生的招聘将包括向亚特兰大当地的几所历史上的黑人学院和大学（HBCU）伸出援手。该研究的结果以及教育推广将向科学界和众多不同的学生提供有关波物理学和机电系统的新发现的信息，预计将激励下一代科学家和工程师。拓扑绝缘体代表了一类新的材料，其中大块材料表现为绝缘体（即，防止波传播），而外围允许这种传播（例如，边缘传播或界面传播）。此外，由于拓扑保护，这些边缘模式被保护免受反向散射，并且因此本质上被保护免受缺陷和瑕疵的存在。这项研究将通过使用理论，计算和实验技术来展示第一个可重构的机械拓扑绝缘体。要探讨的概念包括使用MEMS和压电致动的可重构性的机械手段。这两种方法都将打破反转对称性，导致材料的狄拉克结构分离，产生非平凡的陈数（拓扑的整数度量），从而产生拓扑绝缘体。预计这将开辟新的商业上可行的波导，滤波器和逻辑器件的免疫缺陷和异常的背散射类的途径。与普遍存在的表面声波（SAW）器件非常相似，预期这些新器件在尺寸和成本方面具有优于其电磁对应物的优势，并且预期更高效（例如，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。

项目成果

期刊论文数量（11）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Additive manufacturing of channeled acoustic topological insulators

通道声学拓扑绝缘体的增材制造

DOI：
10.1121/10.0006452
发表时间：
2021
期刊：
The Journal of the Acoustical Society of America
影响因子：
0
作者：
Kliewer, Emily;Darabi, Amir;Leamy, Michael J.
通讯作者：
Leamy, Michael J.

Elastic wave propagation in weakly nonlinear media and metamaterials: a review of recent developments

DOI：
10.1007/s11071-023-08399-6
发表时间：
2023-03
期刊：
Nonlinear Dynamics
影响因子：
5.6
作者：
Matthew D. Fronk;Lezheng Fang;P. Paćko;M. Leamy
通讯作者：
Matthew D. Fronk;Lezheng Fang;P. Paćko;M. Leamy

Topological Insulator-Based Electroacoustic Transistors

基于拓扑绝缘体的电声晶体管

DOI：
10.1115/detc2023-116489
发表时间：
2023
期刊：
American Society of Mechanical Engineers
影响因子：
0
作者：
Kuchibhatla, Sai Aditya;Leamy, Michael J.
通讯作者：
Leamy, Michael J.

Experimental realization of a reconfigurable electroacoustic topological insulator

DOI：
10.1073/pnas.1920549117
发表时间：
2020-07-14
期刊：
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
影响因子：
11.1
作者：
Darabi, Amir;Collet, Manuel;Leamy, Michael J.
通讯作者：
Leamy, Michael J.

Reconfigurable Floquet elastodynamic topological insulator based on synthetic angular momentum bias