激光线宽
等离子体子
生物传感器
表面等离子共振
材料科学
诺共振
光电子学
共振(粒子物理)
光学
纳米技术
纳米颗粒
物理
激光器
粒子物理学
作者
Min Gao,Weimin Yang,Zhengying Wang,Shaowei Lin,Jinfeng Zhu,Zhilin Yang
出处
期刊:Photonics Research
[Optica Publishing Group]
日期:2020-05-26
卷期号:8 (7): 1226-1226
被引量:34
摘要
Coupling effects of surface plasmon resonance (SPR) induce changes in the wavelength, intensity, and linewidth of plasmonic modes. Here, inspired by coupling effects, we reveal an abrupt linewidth-shrinking effect in 2D gold nanohole arrays at the azimuthal angle of 45° arising from the interference of two degenerate SPR modes. We further demonstrate the biosensing capability under various excitation conditions for detecting the critical molecular biomarker of prostatic carcinoma, and achieve the maximum sensitivity at this angle. Our study not only enhances the understanding toward plasmonic resonance-linewidth shrinking, but also provides a promising strategy to greatly improve biosensing performance by light manipulation on plasmonic nanostructures.
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