Temperature Tunable Multiple Ultraviolet to Near-Infrared Perfect Absorption as Highly Sensitive Metamaterial Biosensor

作者：Tian Guo, Ying Zhong, Zhendong Yan, Xingting Pu, Wei Du, Fan Gao, Chaojun Tang · 发表于：IEEE Sensors Journal · 年份：2024 · DOI：10.1109/jsen.2024.3368756 · 被引用次数：59 · 研究领域：Metamaterials and Metasurfaces Applications、Plasmonic and Surface Plasmon Research、Polydiacetylene-based materials and applications

Realizing tunable multiband perfect absorption from ultraviolet (UV) to near-infrared (IR) range in nanophotonics and metamaterials is extremely significant for solar energy harvesting and optical sensors. Here, five narrowband and broadband perfect absorbers (PA) are simultaneously achieved in a simple 3-D metamaterial consisting of aluminum (Al) standing U-shaped split-ring resonators (SUSRRs) on SiO2/Al layer, which stems from the plasmonic hybridization between three high-order surface plasmon polarization (SPPs) and multiple localized surface plasmon (LSPs) localized both within the individual SUSRR as well as within the dielectric layer underneath the SUSRR. These penta-band perfect absorption peaks can be tuned by varying the temperature of the sealed ethanol with a temperature tuning performance of 0.331 nm/°C. Due to the two narrow perfect absorption at 473 and 157 nm being sensitive to the surroundings, our proposed Al SUSRR array as a high-sensitivity biosensor displays the ultra-large figure of merit (FoM$^{\ast} $) of$3.0\times104$and$1.55\times104$, which could be applied to gas sensing and the detection of the sub-nanometer thickness of analyte film.