Abstract Metasurfaces have been widely used to control beam propagation e.g. transmission, reflection, and absorption on an interface through a thin layer of nanoantennas with the thickness smaller than the wavelength. However, previous study of metasurfaces typically focused on controlling only one form of these propagations. In this work, we propose and demonstrate a multipolar plasmonic metasurface that can simultaneously realize antireflection (AR) and antitransmission (AT) in the visible and near-infrared regions. The AR and AT arise from destructive multipolar interferences in the backward and forward directions, respectively, i.e., through the generalized Kerker effect. By engineering the multipolar interference, we show that the AR and AT can happen at different or similar wavelength ranges, which can be used for low-absorption spectral filters due to off-resonance operation or inversely strong optical absorbers through near-resonance operation, respectively. We also present a simple two-dimensional design of the multipolar metasurface that supports AT for one polarization and AR for another polarization over a broadband, which is applicable to broadband transmissive polarizers with efficiency over 90% and the extinction ratio over 18 dB. By tuning the dimension and thus the multipolar interference, the transmitted polarization and operation wavelength are both controllable.

中文翻译：

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通过等离子体超表面中的多极干涉同时实现抗反射和抗透射，以及在光吸收器和宽带偏振器中的应用

摘要 超表面已被广泛用于控制光束传播，例如通过厚度小于波长的纳米天线薄层在界面上的传输、反射和吸收。然而，以前对超表面的研究通常只集中于控制这些传播的一种形式。在这项工作中，我们提出并展示了一种多极等离子体超表面，可以在可见光和近红外区域同时实现抗反射 (AR) 和抗透射 (AT)。AR 和AT 分别来自后向和前向的破坏性多极干扰，即通过广义克尔克效应。通过设计多极干涉，我们表明 AR 和 AT 可以发生在不同或相似的波长范围内，由于偏共振操作或通过近共振操作的反强光吸收体，它们可分别用于低吸收光谱滤波器。我们还提出了一种简单的多极超表面的二维设计，该设计在宽带上支持一种偏振的 AT 和另一种偏振的 AR，适用于效率超过 90% 和消光比超过 18 dB 的宽带透射偏振器。通过调整尺寸并因此调整多极干涉，透射偏振和工作波长都是可控的。我们还提出了一种简单的多极超表面的二维设计，该设计在宽带上支持一种偏振的 AT 和另一种偏振的 AR，适用于效率超过 90% 和消光比超过 18 dB 的宽带透射偏振器。通过调整尺寸并因此调整多极干涉，透射偏振和工作波长都是可控的。我们还提出了一种简单的多极超表面的二维设计，该设计在宽带上支持一种偏振的 AT 和另一种偏振的 AR，适用于效率超过 90% 和消光比超过 18 dB 的宽带透射偏振器。通过调整尺寸并因此调整多极干涉，透射偏振和工作波长都是可控的。