Harnessing Magnonic Nonreciprocity Through Dissipation Engineering

通过耗散工程利用磁非互易性

• 批准号: 2337713
• 负责人: Xufeng Zhang
• 金额: $ 42万
• 依托单位: Northeastern University
• 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: 2024-05-01 至 2027-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2337713&HistoricalAwards=false
• 关键词: Harnessing; Magnonic; Nonreciprocity; Through; Dissipation

Energy dissipation resulting from the interaction of a system with its environment has been traditionally viewed solely as a foe that limits signal lifetimes. However, the advent of new theories has reshaped our perspective on it and enabled novel engineering approaches to utilize dissipation as an important resource for manipulating the behaviors of a given system. Despite its rapid advancements in photonic and electronic circuits, dissipation engineering remains primarily a theoretical pursuit in magnonic and hybrid magnonic systems where information is carried by magnons – the elementary collective spin excitations. In particular, the experimental exploration of unique dissipation phenomena intertwined with nonreciprocity, such as robust mode conversion and the non-Hermitian skin effect, is still in its infancy, lacking well-designed experiments and a clear path toward practical applications. This project will investigate the basic principles of dissipations in magnonic systems and engineering approaches for manipulating dissipations. These endeavors will greatly enhance the fundamental comprehension of how dissipation functions within magnonic systems, leading to advancements in practical applications such as nonreciprocal information processing. The project will provide extensive mentoring and training opportunities for undergraduate and graduate students, and moreover, a new course curriculum will be introduced for undergraduate students, creating new opportunities for underrepresented high school student groups and K-12 students to immerse themselves in science and participate in research.This project aims to harness nonreciprocity by leveraging dissipation engineering in hybrid magnonic systems. Through theory-guided experimental efforts, strongly coupled microwave photon-magnon systems will be explored in three parallel thrusts: Thrust 1 will focus on the proof-of-principle demonstration of mode conversion between two magnon modes in hybrid magnonic systems, which is protected by the topology of the system and thus highly robust. This will be achieved in the time domain using pulsed operations. Thrust 2 will investigate the topological mode conversion between a magnon and a microwave photon mode, which will be implemented in the space domain under continuous wave operation. Thrust 3 will demonstrate the emergence of the skin effect in a hybrid magnonic system that is enabled by dissipative coupling. This research will provide insights for a series of fundamental questions related to the dissipation of magnetic systems, the dynamics of encircling singularity points, the relation between the non-Hermitian skin effect and nonreciprocal transport, and the role of the nonlinearities that are naturally built in the magnetization dynamics. The research outcome will pave the way for leveraging the unique non-Hermitian properties of hybrid magnonics across various applications, ranging from neuromorphic computing to magnon-based logic systems.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.

传统上，系统与其环境相互作用产生的能量耗散被仅仅视为限制信号寿命的敌人，然而，新理论的出现重塑了我们对此的看法，并使新的工程方法能够将耗散作为一种重要的资源。尽管耗散工程在光子和电子电路方面取得了快速进展，但它仍然主要是磁子和混合磁子系统中的理论追求，其中信息由磁振子（基本集体自旋）携带。特别是，对与非互易性交织在一起的独特耗散现象（例如鲁棒模式转换和非厄米趋肤效应）的实验探索仍处于起步阶段，缺乏精心设计的实验和通往实际应用的明确路径。将研究磁波系统中耗散的基本原理和操纵耗散的工程方法，这些努力将极大地增强对波波系统中耗散如何起作用的基本理解。该项目将为本科生和研究生提供广泛的指导和培训机会，此外，还将为本科生引入新的课程，为代表性不足的高中生群体和 K 创造新的机会。 -12 名学生沉浸在科学中并参与研究。该项目旨在通过理论指导的实验工作、耦合微波光子-磁振子系统，利用混合磁子系统中的耗散工程来强有力地利用非互易性。将在三个并行的推力中进行探索：推力 1 将重点关注混合磁振子系统中两种磁振子模式之间的模式转换的原理验证演示，该转换受到系统拓扑的保护，因此将实现高度鲁棒性。 Thrust 2 将研究磁振子和微波光子模式之间的拓扑模式转换，而 Thrust 3 将在连续波操作下在空间域中实现。这项研究将为一系列与磁系统耗散、环绕奇点动力学、非厄米趋肤效应和非互易之间的关系相关的基本问题提供见解。该研究成果将为在各种应用中利用混合磁子学的独特非厄米特性铺平道路。该奖项反映了 NSF 的法定使命，并且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。