超越完美吸收：可重构超指向性吸收器
Going Beyond Perfect Absorption: Reconfigurable Super-directive Absorbers
AI总结：
本文提出并分析了基于可重构阻抗负载的有限尺寸非周期谐振阵列，证明其能突破100%完美吸收极限，在所有照射角度下实现高超单位吸收率。
摘要：
在电磁吸收领域，对于受平面波照射的无限大平面周期结构，其最大可实现的吸收率（即完美吸收）在理论上被限制为入射功率的100%，这是显而易见的。在此，我们展示了在有限尺寸的谐振吸收阵列中，出现了克服这一极限的有趣可能性。我们对位于无限大理想导体平面上的简单二维条带阵列进行了全面分析，其中条带由可重构阻抗负载加载。吸收率定义为条带单位长度耗散功率与阵列宽度单位长度上的入射功率之比。结果表明，即使是规则的阻抗条带阵列也能略微突破100%吸收率的限制，而使用具有优化负载的非周期阵列，与条带完全相同的场景相比，吸收率可显著提高。原则上，通过调节可重构负载，能够在所有照射角度下实现高超单位吸收率。
英文摘要：
In the context of electromagnetic absorption, it is obvious that for an infinite planar periodic structure illuminated by a plane wave, the maximum attainable absorptance, i.e., perfect absorption, is theoretically limited to 100% of the incident power. Here we show that an intriguing possibility of overcoming this limit arises in finite-size resonant absorbing arrays. We present a comprehensive analysis of a simple two-dimensional strip array over an infinite perfectly conducting plane, where the strips are loaded by reconfigurable impedance loads. The absorptance is defined as the ratio of the dissipated power per unit length of the strips to the incident power on the unit length of the array width. The results show that even regular arrays of impedance strips can slightly overcome the limit of 100% absorptance, while using aperiodic arrays with optimized loads, absorptance can be significantly increased as compared with the scenario where the strips are identical. In principle, by tuning the reconfigurable loads, high super-unity absorptance can be realized for all angles of illumination.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
