EFRI NewLAW: Voltage-tuned, topologically-protected magnon states for low loss microwave devices and circuits

该项目的重点是开发用于低损耗微波器件和电路的压控磁性材料，包括隔离器和环行器，它们是允许单向信号传播的关键部件。该计划的一个关键创新是使用有机磁性材料来构建微波电路，就像有机发光二极管（OLED）允许新的显示技术一样。这种方法利用了为商业微波磁器件开发的现有基础设施。考虑到这些设备在无线通信和信息技术中发挥的关键作用，这项工作的影响将具有广度和深度。此外，这项研究计划将形成更广泛的努力，通过当地的外展活动，旨在加强在四个参与大学校园（科罗拉多州立大学，爱荷华州大学，俄亥俄州州立大学和耶鲁大学）的STEM多样性计划，增加公众参与科学的基础。该项目的重点是开发新的方法来实现/增强微波器件的非互易性。具体来说，我们已经定义了两个并行和协同的轨道，利用现有的基础设施周围的磁性微波器件作为跳板，开发基于高保真自偏置磁振子晶体（轨道1）和电压控制通过Dzyaloshinskiii-Moriya相互作用（轨道2）的新型器件架构。在这两种架构中，拓扑保护的传播状态将被利用，以显着提高微波器件，如循环器，隔离器和非互易滤波器的非互易性。这些项目的关键是最近的材料突破，其中室温有机基磁体薄膜已被证明具有超过600 K的磁有序温度，磁共振，保形和低温沉积的质量因子超过8，000，以及在环境条件下的材料稳定性。这些项目具有单独的影响力和集体的协同作用，为技术进步提供了多种途径，这些技术进步将改变非互易微波器件设计的相空间。

This project focuses on the development of voltage-controlled magnetic materials for low loss microwave devices and circuits, including isolators and circulators which are key components that allow one way signal propagation. A key innovation of this program is the use of an organic-based magnetic material to construct the microwave circuits, much in the same way that organic light-emitting diodes (OLEDs) have allowed new display technologies. This approach leverages existing infrastructure developed for commercial microwave magnetic devices. Given the critical role those devices play in wireless communication and information technology, the breadth and depth of the impact of this work will be significant. Additionally, this research program will form the foundation for broader efforts at increasing public engagement in science via local outreach activities that are designed to enhance diversity programs in STEM across the four participating university campuses (Colorado State University, University of Iowa, Ohio State University, and Yale University). This project focuses on the development of novel approaches to achieving/enhancing non-reciprocity in microwave devices. Specifically, we have defined two parallel and synergistic Tracks that exploit the existing infrastructure surrounding magnetic-based microwave devices as a springboard for the development of novel device architectures based on high-fidelity self-biased magnonic crystals (Track 1) and voltage-control via the Dzyaloshinskii-Moriya interaction (Track 2). In both of these architectures, topologically protected propagating states will be exploited to dramatically enhance non-reciprocity in microwave devices such as circulators, isolators, and non-reciprocal filters. These projects are critically enabled by a recent materials breakthrough in which thin films of a room temperature organic-based magnet have been shown to exhibit magnetic ordering temperatures of over 600 K, quality factors in excess of 8,000 for magnetic resonance, conformal and low temperature deposition, and materials stability under ambient conditions. These projects are individually impactful and collectively synergistic, providing multiple paths to technological advances that will transform the phase space for the design of non-reciprocal microwave devices.