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Multifunctional hyperbolic nanogroove metasurface for submolecular detection

swin0826 添加于 2017/6/20 21:29:42  159次阅读 | 0次推荐 | 0个评论

Metasurface serves as a promising plasmonic sensing platform for engineering the enhanced light–matter interactions. Here, a hyperbolic metasurface with the nanogroove structure in the subwavelength scale is designed. This metasurface is able to modify the wavefront and wavelength of surface plasmon wave with the variation of the nanogroove width or periodicity. At the specific optical frequency, surface plasmon polaritons are tightly confined and propagated with a diffraction-free feature due to the epsilon-near-zero effect. Most importantly, the groove hyperbolic metasurface can enhance the plasmonic sensing with an ultrahigh phase sensitivity of 30 373 deg RIU−1 and Goos–Hänchen shift sensitivity of 10.134 mm RIU−1. The detection resolution for refractive index change of glycerol solution is achieved as 10−8 RIU based on the phase measurement. The detection limit of bovine serum albumin (BSA) molecule is measured as low as 0.1 × 10−18m (1 × 10−19 mol L−1), which corresponds to a submolecular detection level (0.13 BSA mm−2). As for low-weight biotin molecule, the detection limit is estimated below 1 × 10−15m (1 × 10−15 mol L−1, 1300 biotin mm−2). This enhanced plasmonic sensing performance is two orders of magnitude higher than those with current state-of-art plasmonic metamaterials and metasurfaces.

作 者:Li Jiang, Shuwen Zeng, Zhengji Xu, Qingling Ouyang, Dao‐Hua Zhang, Peter Han Joo Chong, Philippe Coquet, Sailing He, Ken‐Tye Yong
期刊名称: Small
期卷页: 2017/6/8 第卷 第期 1-10页
学科领域:化学科学 » 无机化学 » 无机纳米化学
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原文链接:https://www.researchgate.net/publication/317501397_Multifunctional_Hyperbolic_Nanogroove_Metasurface_for_Submolecular_Detection
DOI: 10.1002/smll.201700600
ISBN: 1613-6829
关键词: hyperbolic metamaterials, plasmonics, surface plasmon, optical sensors, metasurfaces
备 注: Journal impact factor: 8.643
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