Friday, September 8, 2017

Abstract-Nanoparticles doped film sensing based on terahertz metamaterials

Weimin Liu. Author links open the author workspace.Fei Fan. Author links open the author workspace.Shengjiang ChangJiaqing Hou. Author links open the author workspace.Meng Chen. Author links open the author workspace.Xianghui  WangJinjun Bai

. Author links open the author workspace.FeiFan
A nanoparticles concentration sensor based on doped film and terahertz (THz) metamaterial has been proposed. By coating the nanoparticles doped polyvinyl alcohol (PVA) film on the surface of THz metamaterial, the effects of nanoparticle concentration on the metamaterial resonances are investigated through experiments and numerical simulations. Results show that resonant frequency of the metamaterial linearly decreases with the increment of doping concentration. Furthermore, numerical simulations illustrate that the redshift of resonance results from the changes of refractive index of the doped film. The concentration sensitivity of this sensor is 3.12 GHz/0.1%, and the refractive index sensitivity reaches 53.33 GHz/RIU. This work provides a non-contact, nondestructive and sensitive method for the detection of nanoparticles concentration and brings out a new application on THz film metamaterial sensing.

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