Conformal Graphene-Decorated Nanofluidic Sensors Based on Surface Plasmons at Infrared Frequencies

Sensors

Jinpeng Nong¹  Guiwen Zhang¹  Jun Yang²  Wei Luo³  Wei Wei⁴  Linlong Tang⁴ 

[1] Systems, Ministry of Education of China, Chongqing University, Chongqing 400044, China;Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 401122, China;College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China;;Key Laboratory of Optoelectronic Technology &

关键词: sensor;    surface plasmons;    nanofluidic;    conformal grapheme;    infrared;   

DOI  :  10.3390/s16060899

来源: DOAJ

【 摘 要 】

An all-in-one prism-free infrared sensor based on graphene surface plasmons is proposed for nanofluidic analysis. A conformal graphene-decorated nanofluidic sensor is employed to mimic the functions of a prism, sensing plate, and fluidic channel in the tradition setup. Simulation results show that the redshift of the resonant wavelength results in the improvement of sensitivity up to 4525 nm/RIU. To reshape the broadened spectral lines induced by the redshift of the resonant wavelength to be narrower and deeper, a reflection-type configuration is further introduced. By tuning the distance between the graphene and reflective layers, the figure of merit (FOM) of the device can be significantly improved and reaches a maximum value of 37.69 RIU−1, which is 2.6 times that of the former transmission-type configuration. Furthermore, the optimized sensor exhibits superior angle-insensitive property. Such a conformal graphene-decorated nanofluidic sensor offers a novel approach for graphene-based on-chip fluidic biosensing.

【 授权许可】

Unknown