Perfect optical metamaterial absorbers (POMMA) utilize intrinsic loss, with the aid of appropriate structural design, to achieve near unity absorption at a certain wavelength. In all the reported absorbers, the absorption occurs only at a single wavelength or dual/multi-band wavelengths where plasmon resonances are ex-cited in the nanostructure. Here we not only show a single-band perfect absorber but also demonstrate that our proposed design has the ability to be multi-band absorber at the same structure. Furthermore, we numerically demonstrate the proposed POMMA can be utilized as a glucose sensor for refractive index sensing which has more than 225 nm/RIU sensitivity at the infrared frequency regime which is good value. Its polarization-independent absorbance is about 100% at normal incidence for both TE and TM polarization modes. The proposed optical glucose sensor offers great potential to maintain the performance of localized surface plasmon (LSP) sensors in nanostructures in food industry applications.

中文翻译：

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与偏振无关的完美光学超材料吸收剂，在食品工业中用作葡萄糖传感器。

完美的光学超材料吸收剂（POMMA）利用固有损耗，借助适当的结构设计，可以在特定波长下实现接近单位吸收。在所有报道的吸收剂中，吸收仅发生在纳米结构中激发等离子体激元共振的单波长或双/多频带波长。在这里，我们不仅展示了单频带的理想吸收器，而且还证明了我们提出的设计具有在相同结构上成为多频带吸收器的能力。此外，我们在数值上证明了所提出的POMMA可用作用于折射率传感的葡萄糖传感器，该传感器在红外频率范围内具有超过225 nm / RIU的灵敏度，具有很好的价值。对于TE和TM偏振模式，其与偏振无关的吸光度在法向入射时约为100％。