Active and Nonlinear Artificial Impedance Surfaces

目的：本项目的目的是开发新的非线性有源人工阻抗面。这代表了一个新的研究领域，具有显著扩展人工介质能力的潜力，并克服了当前无源阻抗表面的局限性。该计划将涉及研究的各个方面，从概念开发和模拟到制造和测量。智力上的优点：智力上的优点是，主动和非线性表面的发展将扩展人类的知识，包括非线性表面波效应，以及通过使用嵌入周期结构的有源电子来传播表面波。这个提议是变革性的，因为这些结构将在尺寸和频率尺度上展示独特的新现象，可以直接探测电场，从而全面检查潜在的物理。在未来，这些概念也可以扩展到其他制度，如光学表面，包括活性或非线性材料。更广泛的影响：更广泛的影响是，该项目将涉及新的外展工作，以历史上代表性不足的群体，以及K-12学生，以激励他们追求更高的工程教育。这项外展工作将通过与加州大学圣地亚哥分校雅各布斯工程学院IDEA（包容、多样性、卓越和进步）中心的协调进行。PI将承诺与该中心合作，从历史上代表性不足的群体中寻找潜在的研究生，并寻找机会向K-12学生宣传这项研究的兴奋之处。

Objective: The objective of this program is to develop new nonlinear and active artificial impedance surfaces. This represents a new research area with the potential to significantly expand the capabilities of artificial media, and overcome the limitations of current passive impedance surfaces. This program will involve all aspects of research, from conceptual development and simulations to fabrication and measurements. Intellectual merit: The intellectual merit is that the development of active and nonlinear surfaces will expand human knowledge to include nonlinear surface wave effects, as well as superluminal propagation of surface waves through the use of active electronics embedded in periodic structures. This proposal is transformative in that these structures will demonstrate unique new phenomena at a size and frequency scale that is amenable to direct probing of the electric field to enable full examination of the underlying physics. In the future, these concepts can also be extended to other regimes such as optical surfaces that include active or nonlinear materials. Broader impacts: The broader impacts are that this program will involve new outreach efforts to historically underrepresented groups, as well as K-12 students to motivate them to pursue higher education in engineering. This outreach effort will be through coordination with the UCSD Jacobs School of Engineering IDEA (Inclusion, Diversity, Excellence, and Advancement) Center. The PI will pledge to work with the center to identify potential grad students from historically underrepresented groups, and to identify opportunities to promote the excitement of this research to K-12 students.