Abstract
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.
Highlights
Metasurfaces consisting of two-dimensional arrangement of nanoantennas with subwavelength size, spacing, and thickness can manipulate the amplitude, phase, and polarization of light at will [1, 2]
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
The AR and AT wavelengths can be tuned to be either different or near each other, which can be used for spectral filters with low absorption due to offresonance operation or inversely optical absorption (OA) through nearresonance operation, respectively
Summary
Metasurfaces consisting of two-dimensional arrangement of nanoantennas with subwavelength size, spacing, and thickness can manipulate the amplitude, phase, and polarization of light at will [1, 2]. We reported a multipolar plasmonic metasurface for transmission wavefront control in the visible and near-infrared (IR) region with high efficiency by tuning the multipolar interference approaching the generalized Kerker condition [38, 39]. The record high transmission of plasmonic metasurfaces in this work is attributed to destructive multipolar interference in the backward direction and off-resonance operation of the multipole responses, which suppresses the reflection and reduces the absorption in the plasmonic nanoantennas, respectively. This multipolar plasmonic metasurface can find other applications in optical coatings, filters, and splitters
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