We report on an all-dielectric cut-off perfect absorber and an optical long-pass filter using a gallium arsenide multi-nanocylinder array grown on SiO₂ in the wavelength from ultraviolet to infrared. A high average absorption of 0.985 is realized in the absorption band and there is a sharp cut-off between the absorption band and the non-absorption band, where the extinction ratio is 12.17 dB, the extinction difference is 0.88, and the cut-off slope is 0.0047 nm⁻¹. Based on the cut-off absorption mechanism, a transmissive long-pass cut-off filter is proposed with extinction ratio of 21.56 dB, extinction difference of 0.86 and cutoff slope of 0.0049 nm⁻¹. The average transmission of only 0.006 in the stop band and 0.967 in the pass band is realized. The demonstrated devices suggest an efficient way of designing cut-off perfect absorbers and optical filters with metasurface, which is of important applications in advanced nanophotonic devices and integrated photonic systems.

中文翻译：

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基于多纳米圆阵列完美截止吸收体的全介电超表面长通截止滤波器

我们报告了全电介质截止完美吸收器和光学长通滤波器，该滤波器使用在 SiO ₂上生长的砷化镓多纳米圆柱阵列，波长从紫外到红外。吸收带内实现了 0.985 的高平均吸收，吸收带和非吸收带之间有一个尖锐的截止，消光比为 12.17 dB，消光差为 0.88，截止斜率为0.0047 nm ^-1。基于截止吸收机制，提出了一种消光比为21.56 dB，消光差为0.86，截止斜率为0.0049 nm ^-1的透射式长通截止滤波器. 实现了阻带中仅 0.006 和通带中 0.967 的平均透射率。所展示的器件提出了一种设计具有超表面的截止完美吸收器和光学滤波器的有效方法，这在先进的纳米光子器件和集成光子系统中具有重要应用。