Electromagnetic periodic structures and metamaterials for imaging and wireless technology

用于成像和无线技术的电磁周期结构和超材料

• 批准号: RGPIN-2020-05403
• 负责人: Markley, Loïc
• 金额: $ 2.04万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=740551
• 关键词: Electromagnetic; periodic; structures; metamaterials; imaging

The rapid expansion of wireless networking and the inclusion of wireless functionality in everyday devices is driving the ongoing development of wireless technology. Growing consumer appetite for mobile devices coupled with the emergence of the internet of things and machine to machine networking has led to growth that is projected to bring the number of connected devices to 20 billion by 2022. In recent years, periodic structures and metamaterials (artificial materials with exotic electromagnetic responses) have provided new techniques for electromagnetic field manipulation that have led to advances in imaging, antennas, radio-frequency circuits, and more. This Discovery Grant investigates the electromagnetic properties of periodic structures and metamaterials in order to improve the performance of high-resolution superlenses and develop innovative solutions in wireless technology. Recent studies by our group have demonstrated that current superlens designs suffer from imaging artifacts caused by the way light scatters at the edges of lenses. We will investigate how modifications to the edge geometry and underlying metamaterial properties can suppress these artifacts and achieve robust high-resolution imaging. This work has applications in imaging microscopy, micro-fabrication, nano-scale lenses, and more. We will also explore the use of periodic structures and metamaterials in two applications of contemporary interest: wireless sensing and wireless power transfer. In the first, we design passive sensing layers that can be integrated within object surfaces to provide information about the condition of those surfaces. The sensing layers are scanned by an external reader device, providing non-invasive sensing at a distance with high sensitivity. In the second, we look at chains of resonant coils designed to transfer power through the air over large distances with high efficiency. This work has applications in distributed wireless power transfer systems for homes, commercial buildings, and transportation infrastructure. This approach to research on metamaterial imaging and wireless technology provides opportunities for students to develop a strong foundation in the electromagnetic theory of periodic structures while also gaining experience in experimental and applied research. In particular, training students to analyze non-canonical structures like metamaterials provides a deeper understanding of the underlying physics of wave propagation, which better prepares them for a career in applied electromagnetics. All research projects under this program are based on the philosophy of mastering the relevant electromagnetic theory before investigating any specific applications. This helps all program participants, from the principal investigator to graduate students and undergraduate research assistants, to develop mastery of electromagnetic principles, improve problem solving skills, and even inspire new research ideas.

无线网络的快速扩展和日常设备中无线功能的包含正在推动无线技术的持续发展。消费者对移动的设备的需求不断增长，加上物联网和机器对机器网络的出现，预计到2022年，连接设备的数量将达到200亿。近年来，周期性结构和超材料（具有奇异电磁响应的人造材料）为电磁场操纵提供了新技术，从而导致成像，天线，射频电路等方面的进步。这项发现补助金研究周期性结构和超材料的电磁特性，以提高高分辨率超透镜的性能，并开发无线技术的创新解决方案。我们小组最近的研究表明，目前的超级透镜设计受到由透镜边缘处的光散射方式引起的成像伪影的影响。我们将研究如何修改的边缘几何形状和底层的超材料属性可以抑制这些文物，并实现强大的高分辨率成像。这项工作在成像显微镜、微加工、纳米级透镜等方面都有应用。我们还将探索周期性结构和超材料在当代感兴趣的两个应用中的使用：无线传感和无线电力传输。首先，我们设计了可以集成在物体表面的无源传感层，以提供有关这些表面状况的信息。传感层由外部读取器设备扫描，以高灵敏度在一定距离处提供非侵入式感测。在第二部分中，我们研究了谐振线圈链，这些谐振线圈旨在通过空气以高效率远距离传输电力。这项工作在家庭、商业建筑和交通基础设施的分布式无线电力传输系统中有应用。这种超材料成像和无线技术的研究方法为学生提供了在周期性结构的电磁理论方面打下坚实基础的机会，同时也获得了实验和应用研究的经验。特别是，训练学生分析非规范结构，如超材料，提供了波传播的基础物理更深入的了解，这更好地为他们在应用电磁学的职业生涯做好准备。该计划下的所有研究项目都基于在研究任何具体应用之前掌握相关电磁理论的理念。这有助于所有项目参与者，从首席研究员到研究生和本科生研究助理，掌握电磁原理，提高解决问题的能力，甚至激发新的研究思路。