Abstract The design method of simple structured broadband perfect metamaterial absorbers (BPMAs) operating in selected wavebands from 150 nm to 16.5 μm over a wide range of incident angle is proposed. This type of BPMA composed of a metal substrate and a two-dimensional metal column hole array coated with a dielectric film is designed using finite-difference time-domain method. By selecting vanadium (V) to be the metallic material, a TiO2/V BPMA for visible-near infrared waveband is analyzed theoretically and investigated experimentally. Moreover, theoretical results show that the absorption waveband of the TiO2/V BPMA can be selected from 150 nm to 1.7 μm by adjusting the period, keeping the topology and structural ratio invariable. By selecting titanium (Ti) to be the metallic material, the absorption waveband of the TiO2/Ti BPMA can be selected from 1.5 to 5.5 μm by adjusting the period, keeping the topology and structural ratio invariable. Finally, a Ge/Ti BPMA with high absorption spectra above 0.9 in waveband from 11.6 to 16.5 μm is provided to further prove this design method. The novel design idea might be helpful to simplify the work of design, and also to further exploit the design idea for broader spectral range from optical to radio waveband.

中文翻译：

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对选定波段具有相同拓扑和结构比的简单结构宽带超材料吸收器

摘要 提出了在 150 nm 至 16.5 μm 选定波段和宽入射角范围内工作的简单结构宽带完美超材料吸收器 (BPMA) 的设计方法。这种由金属基板和涂有介电膜的二维金属柱孔阵列组成的BPMA是使用有限差分时域方法设计的。通过选择钒(V)作为金属材料，对可见-近红外波段的TiO2/V BPMA进行了理论分析和实验研究。此外，理论结果表明，通过调整周期，保持拓扑结构和结构比例不变，TiO2/V BPMA 的吸收波段可以在 150 nm 到 1.7 μm 之间选择。通过选择钛 (Ti) 作为金属材料，TiO2/Ti BPMA的吸收波段可以通过调整周期选择1.5~5.5 μm，保持拓扑结构比例不变。最后，提供了在 11.6 至 16.5 μm 波段具有高于 0.9 的高吸收光谱的 Ge/Ti BPMA 以进一步证明这种设计方法。新颖的设计理念可能有助于简化设计工作，并进一步开发从光学波段到无线电波段的更宽光谱范围的设计理念。