All-Dielectric Metasurfaces with High-Fluorescence-Enhancing Capability

Applied Sciences

卷:8

Masanobu Iwanaga¹ 

[1] National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan;

关键词: all-dielectric metasurface;    Mie resonance;    guided resonance;    fluorescence enhancement;   

DOI  :  10.3390/app8081328

来源: DOAJ

【 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.

【 授权许可】

Unknown