We report the experimental realization of a multifunctional microscale plasmonic metasurface capable of sampling a light beam and performing five functionalities, while allowing high direct transmission and maintenance of the properties of the input light beam. The plasmonic metasurface integrates light-to-surface-plasmon coupling, two-channel wavelength demultiplexing with a channel spacing smaller than 44 nm, wavelength and polarization controllable beam splitting of a monochromatic, single polarization signal, and four-level polarization and wavelength-polarization demultiplexing in an all-in-one structure. Such a device can play a key role for on-chip adaptable integrated circuits for parallel signal processing, communications, and nondestructive sensing.

中文翻译：

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多功能等离子体超表面解复用器和波长偏振可控分束器

我们报告了多功能微尺度等离子体超表面的实验实现，该表面能够对光束进行采样并执行五种功能，同时允许高直接传输和保持输入光束的特性。等离子体超表面集成了光到表面等离子体耦合、通道间距小于 44 nm 的双通道波长解复用、单色单偏振信号的波长和偏振可控光束分裂以及四级偏振和波长偏振多合一结构中的解复用。这种器件可以在用于并行信号处理、通信和无损传感的片上自适应集成电路中发挥关键作用。