材料科学
超材料
吸光度
极化(电化学)
等离子体子
超材料吸收剂
光电子学
折射率
波长
光学
表面等离子体子
纳米结构
吸收(声学)
表面等离子共振
纳米技术
物理
化学
可调谐超材料
纳米颗粒
物理化学
复合材料
出处
期刊:IEEE Transactions on Nanobioscience
[Institute of Electrical and Electronics Engineers]
日期:2019-10-01
卷期号:18 (4): 622-627
被引量:105
标识
DOI:10.1109/tnb.2019.2929802
摘要
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.
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