场驱动非线性超表面：高选择性传输与宽带屏蔽之间的自适应转换
Field-driven nonlinear metasurface: self-adaptive transition between high-selectivity transmission and broadband shielding
AI总结：
针对电磁环境复杂对电子信息系统可靠性的挑战，提出场驱动非线性超表面，通过构建可重构混合耦合拓扑实现传输与屏蔽模式自适应转换，实验获高选择性通带和宽带屏蔽，提升了射频前端系统电磁保护性能。
AI中文摘要：
电磁环境复杂性的不断升级对现代电子信息系统的可靠性构成重大挑战。为满足电子设备空间电磁安全需求，我们提出一种场驱动非线性超表面（NMS），可有效抵御带外干扰和带内高强度辐射。通过构建可重构混合耦合拓扑并映射到超表面几何结构，该NMS能根据入射功率在传输和屏蔽模式间实现自适应转换。实验结果与理论分析和全波模拟吻合良好。我们获得了滚降率大于20.6dB/GHz的高选择性通带以及屏蔽效能超过23.6dB且带宽达60%的宽带屏蔽，性能相比文献有显著提升。我们的发现为射频前端系统的全面电磁保护开辟了一条有前景的途径。
英文摘要：
The escalating complexity of electromagnetic (EM) environment is posing a significant challenge to the reliability of modern electronic information systems. To address the need for the spatial EM safety of electronic devices, we present a field-driven nonlinear metasurface (NMS) that enables effective protection against out-of-band interference and in-band high-intensity radiation. By constructing a reconfigurable hybrid coupling topology and mapping it to the metasurface geometry, the proposed NMS achieves a self-adaptive transition between its transmission and shielding mode depending on the incident power. The experimental results are in good agreement with theoretical analysis and full-wave simulation. We obtain a highly selective passband with roll-off rate larger than 20.6dB/GHz and a broadband shielding with shielding effectiveness exceeding 23.6dB and 60% bandwidth, demonstrating a significantly enhanced performance relative to the literature. Our findings establish a promising route toward comprehensive EM protection on radio frequency front-end systems.
