Hybrid Metal-Dielectric Nano-Aperture Antenna for Surface Enhanced Fluorescence

被引：12
|
作者：
Lu, Guowei [1 ,2 ,3 ]
Xu, Jianning [1 ,2 ]
Wen, Te [1 ,2 ]
Zhang, Weidong [1 ,2 ]
Zhao, Jingyi [1 ,2 ]
Hu, Aiqin [1 ,2 ]
Barbillon, Gregory [4 ]
Gong, Qihuang [1 ,2 ,3 ]
机构：
[1] Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
[2] Peking Univ, Sch Phys, Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China
[3] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China
[4] EPF Ecole Ingn, 3 Bis Rue Lakanal, F-92330 Sceaux, France
来源：
MATERIALS | 2018年 / 11卷 / 08期
基金：
中国国家自然科学基金;
关键词：
plasmonics; nano-aperture; surface-enhanced fluorescence; antenna; hybrid; SINGLE-MOLECULE ANALYSIS; MODE WAVE-GUIDES; SPONTANEOUS EMISSION; SILICON; NANOANTENNA; GRATINGS; PLATFORM; GAP;
D O I：
10.3390/ma11081435
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A hybrid metal-dielectric nano-aperture antenna is proposed for surface-enhanced fluorescence applications. The nano-apertures that formed in the composite thin film consist of silicon and gold layers. These were numerically investigated in detail. The hybrid nano-aperture shows a more uniform field distribution within the apertures and a higher antenna quantum yield than pure gold nano-apertures. The spectral features of the hybrid nano-apertures are independent of the aperture size. This shows a high enhancement effect in the near-infrared region. The nano-apertures with a dielectric gap were then demonstrated theoretically for larger enhancement effects. The hybrid nano-aperture is fully adaptable to large-scale availability and reproducible fabrication. The hybrid antenna will improve the effectiveness of surface-enhanced fluorescence for applications, including sensitive biosensing and fluorescence analysis.
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页数：10
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