隐身超均匀器件的固有局限性
Extrinsic Limitations of Stealthy Hyperuniform devices
AI总结：
研究隐身超均匀超表面在光学频率下的弹性散射抑制，发现实验抑制效果弱于理论预测，并分析了物理原因与性能界限。
摘要：
超均匀性承诺了一种不寻常的波控制形式：在没有周期秩序的情况下，在扩展的角度范围内抑制弹性散射。在这里，我们提出了在光学频率下工作的二维隐身超均匀超表面的全面实验和理论研究。与理论预期一致，我们观察到在电子束光刻制备的超表面中，镜面方向附近的弹性散射显著减少。然而，测量的抑制效果远弱于基于理想隐身超均匀点模式生成器的结构因子计算所预测的结果。我们识别并定量分析了这一差异的物理起源，并建立了现实的性能界限。通过隔离主要的限制机制，我们的结果为隐身超均匀性在功能器件中的实现提供了实用的设计指南。
英文摘要：
Hyperuniformity promises an unusual form of wave control: the suppression of elastic scattering over extended angular ranges without periodic order. Here, we present a comprehensive experimental and theoretical study of 2D stealthy hyperuniform metasurfaces operating at optical frequencies. In agreement with theoretical expectations, we observe a pronounced reduction of elastic scattering around the specular direction in metasurfaces fabricated by electron-beam lithography. However, the measured suppression is substantially weaker than that predicted by structure-factor calculations based on ideal stealthy hyperuniform point-pattern generators. We identify and quantitatively analyze the physical origins of this discrepancy and establish realistic performance bounds. By isolating the dominant limiting mechanisms, our results provide practical design guidelines for the implementation of stealthy hyperuniformity in functional devices.
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