Shi Leilei, Shang Jiangshan, Liu Zhengqi, Li Yuyin, Fu Guolan, Liu Xiaoshan, Pan Pingping, Luo Haimei, Liu Guiqiang
Jiangxi Key Laboratory of Nanomaterials and Sensors, School of Physics, Communication and Electronics, Jiangxi Normal University, Nanchang 330022 People's Republic of China.
Nanotechnology. 2020 Nov 13;31(46):465501. doi: 10.1088/1361-6528/abad60.
We theoretically propose a simple ultra-narrow multi-band perfect absorber for sensing applications. The perfect absorber consists of periodically arranged metallic nanodisks etched with regular prismatic holes standing on the dielectric-metal bi-layer films. Multiple ultra-narrow perfect absorption bands are obtained in the near-infrared region with the maximum bandwidth less than 21 nm and the intensity as high as 99.86%. The ultra-narrow multi-band perfect absorption originates from the synergy of localized surface plasmons, propagating surface plasmons and lattice resonances. The perfect absorber also presents other significant advantages, e.g. polarization insensitivity and high sensitivity of surrounding environments. Moreover, the prominent sensing performance for detecting the trace amounts of glucose in water is demonstrated. These features make it a promising candidate with great potential in the fields of perfect absorbers, plasmonic sensors, filters and multiplexing binding bio-molecular detection.
我们从理论上提出了一种用于传感应用的简单超窄多波段完美吸收体。该完美吸收体由周期性排列的金属纳米盘组成，这些纳米盘蚀刻有规则的棱柱形孔，位于介电-金属双层膜上。在近红外区域获得了多个超窄完美吸收带，最大带宽小于21纳米，强度高达99.86%。超窄多波段完美吸收源于局域表面等离子体、传播表面等离子体和晶格共振的协同作用。该完美吸收体还具有其他显著优点，例如偏振不敏感性和对周围环境的高灵敏度。此外，还展示了其在检测水中痕量葡萄糖方面的卓越传感性能。这些特性使其成为完美吸收体、等离子体传感器、滤波器和多重结合生物分子检测领域中极具潜力的候选者。
