All-Dielectric Metasurfaces with High-Fluorescence-Enhancing Capability

被引:25
作者
Iwanaga, Masanobu [1 ]
机构
[1] NIMS, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan
来源
APPLIED SCIENCES-BASEL | 2018年 / 8卷 / 08期
关键词
all-dielectric metasurface; Mie resonance; guided resonance; fluorescence enhancement; NEGATIVE-INDEX METAMATERIAL; ENHANCEMENT; REFRACTION; PHASE; POLARIZATION; FORMULATION; RESOLUTION; OPTICS;
D O I
10.3390/app8081328
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
All-dielectric metasurfaces are an emerging subfield in photonics. Light-wave manipulation has been extensively explored in these metasurfaces. Although light-matter interaction has also been investigated in these metasurfaces, only a limited number of studies have been reported to date. Here, we employ Si-rod-array metasurfaces to examine their fluorescence-enhancing capability. They were designed to have prominent resonances at the working wavelengths of fluorescent molecules. As a result, we experimentally observed significant fluorescence intensity enhancement, exceeding 1000-fold for a reference substrate that was a non-enhancing, flat Si wafer. Thus, we conclude that the all-dielectric metasurfaces can potentially serve as highly fluorescence-enhancing platforms. Their performance is comparable to the best performance reported for metallic metasurfaces. These results strongly suggest that all-dielectric metasurfaces can contribute to fluorescence-sensing of diverse molecules, including biomolecules.
引用
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页数:15
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