As opposed to metasurfaces, which can produce a single output waveform in response to a single input waveform, volumetric metamaterials have the ability to perform independent functions on many distinct input waveforms. Here, we present an experimental demonstration of this multiplexing capability using a volumetric metamaterial designed using the symphotic method. The symphotic method realizes highly efficient multiplexing structures in the strong scattering limit. In contrast to perturbative design methods like volume holography that are only applicable in weakly scattering media, we provide a comprehensive approach that takes into consideration design and fabrication constraints and which can be verified in simulations. We then demonstrate an experimental realization of a symphotic device operating at a frequency of 10 GHz, which has been optimized for three distinct input waveforms corresponding to three distinct output waveforms. The device is realized using a low-loss 3D-printed material. The symphotic device consists of a lattice of dielectric cylindrical elements with varying radii, excited in a parallel-plate waveguide to enforce two-dimensional field symmetry. The experimental results show excellent agreement with analytical coupled-dipole method simulations and finite-element simulations. The experiments further demonstrate the scalability of symphotic metamaterials and their viability for advanced RF and optical devices.

中文翻译：

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微波频率下的交感多路传输介质

与可以响应单个输入波形而产生单个输出波形的超表面相反，体积超材料具有对许多不同的输入波形执行独立功能的能力。在这里，我们展示了使用一种通过渐近线法设计的体积超材料对这种多路复用能力的实验演示。渐近线方法在强散射极限下实现了高效的复用结构。与仅适用于弱散射介质的体积全息术之类的摄动设计方法相反，我们提供了一种综合方法，该方法考虑了设计和制造方面的限制，可以在仿真中进行验证。然后，我们演示了以10 GHz频率工作的交感设备的实验实现，已针对对应于三个不同输出波形的三个不同输入波形进行了优化。该设备使用低损耗的3D打印材料实现。该共鸣装置由具有变化半径的介电圆柱体元素的晶格组成，在平行板波导中激发以增强二维场对称性。实验结果与解析耦合偶极子方法仿真和有限元仿真显示出极好的一致性。实验进一步证明了交感超材料的可扩展性及其在先进的射频和光学设备中的可行性。该共鸣装置由具有变化半径的介电圆柱元件的晶格组成，在平行板波导中受激以增强二维场对称性。实验结果与解析耦合偶极子方法模拟和有限元模拟具有很好的一致性。实验进一步证明了交变超材料的可扩展性及其在先进的射频和光学设备中的可行性。该共鸣装置由具有变化半径的介电圆柱元件的晶格组成，在平行板波导中受激以增强二维场对称性。实验结果与解析耦合偶极子方法模拟和有限元模拟具有很好的一致性。实验进一步证明了交变超材料的可扩展性及其在先进的射频和光学设备中的可行性。