Replication data for: Experimental Observation of Superscattering

Matlab files for the figures in "Experimental Observation of Superscattering" by Chao Qian et al. [Paper Abstract] Superscattering, induced by degenerate resonances, breaks the fundamental single-channel limit of the scattering cross section of subwavelength structures; in principle, an arbitrarily large total cross section can be achieved via superscattering. It thus provides a unique way to strengthen the light-matter interaction at the subwavelength scale, and has many potential applications in sensing, energy harvesting, bioimaging (such as magnetic resonance imaging), communication, and optoelectronics. However, the experimental demonstration of superscattering remains an open challenge due to its vulnerability to structural imperfections and intrinsic material losses. Here we report the first experimental evidence for superscattering by demonstrating the superscattering simultaneously in two different frequency regimes through both the far-field and near-field measurements. The underlying mechanism for the observed superscattering is the degenerate resonances of confined surface waves, by utilizing a subwavelength metasurface-based multilayer structure. Our work paves the way towards practical applications based on superscattering.

钱超等人所著《超散射的实验观测》一文中各图对应的Matlab文件。
[论文摘要]
由简并共振（degenerate resonances）诱导的超散射（superscattering）打破了亚波长结构散射截面的单通道基本极限；理论上，通过超散射可实现任意大的总截面。因此，它为增强亚波长尺度下的光-物质相互作用提供了独特途径，并在传感、能量收集、生物成像（如磁共振成像）、通信及光电子学等领域具有诸多潜在应用。然而，由于超散射对结构缺陷和本征材料损耗极为敏感，其实验验证仍是一项未解决的挑战。本文通过远场与近场测量，在两个不同频率范围内同时观测到超散射现象，首次报道了超散射的实验证据。所观测到的超散射现象，其内在机制是基于亚波长超表面（subwavelength metasurface）的多层结构中受限表面波（confined surface waves）的简并共振。本研究为超散射的实际应用奠定了基础。