IEEE Trans Nanobioscience. 2019 Oct;18(4):622-627. doi: 10.1109/TNB.2019.2929802. Epub 2019 Jul 19.
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.
完美光学超材料吸收器（POMMA）利用固有损耗，辅以适当的结构设计，在特定波长处实现近于 1 的吸收率。在所有已报道的吸收器中，吸收仅发生在单一波长或双/多波段波长处，其中在纳米结构中激发等离子体共振。在这里，我们不仅展示了一个单波段的完美吸收器，还证明了我们提出的设计在同一结构下具有成为多波段吸收器的能力。此外，我们通过数值模拟证明，所提出的 POMMA 可用作葡萄糖传感器，用于折射率传感，在红外频率范围内具有超过 225nm/RIU 的灵敏度，这是一个很好的值。其在正入射时对 TE 和 TM 偏振模式的偏振无关吸收率约为 100%。所提出的光学葡萄糖传感器在食品工业应用中为保持纳米结构中局域表面等离子体（LSP）传感器的性能提供了巨大的潜力。
