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Toroidal metasurfaces integrated with microfluidic for terahertz refractive index sensing
Chen, Xu1; Fan, Wenhui1,2,3
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A terahertz refractive index sensor consisting of toroidal dipole resonance metasurface integrated with microfluidic channel is proposed. The excitation of toroidal dipole resonance in this metasurface and the localized electromagnetic field enhancement in microfluidic channel are investigated comprehensively. Numerical results show that the calculated quality factor and the corresponding figure of merit can reach 1103 and 244, much higher than previously reported terahertz metamaterials sensors. Moreover, the refractive index sensing capabilities of non-polar and polar liquids are also investigated, which demonstrate the resonant frequency shift does not depend on the losses of analytes and show this device can be used for sensing various materials, including highly absorptive materials. This proposed structure can be extended to work in other frequency regions and has potential applications in high performance gases, liquids and biological materials sensing.

Keywordterahertz metasurfaces toroidal dipole microfluidic refractive index sensing
Indexed BySCI ; EI
WOS IDWOS:000485742400003
EI Accession Number20194207534627
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Document Type期刊论文
Corresponding AuthorFan, Wenhui
Affiliation1.Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Shaanxi, Peoples R China
2.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
3.Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China
Recommended Citation
GB/T 7714
Chen, Xu,Fan, Wenhui. Toroidal metasurfaces integrated with microfluidic for terahertz refractive index sensing[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2019,52(48).
APA Chen, Xu,&Fan, Wenhui.(2019).Toroidal metasurfaces integrated with microfluidic for terahertz refractive index sensing.JOURNAL OF PHYSICS D-APPLIED PHYSICS,52(48).
MLA Chen, Xu,et al."Toroidal metasurfaces integrated with microfluidic for terahertz refractive index sensing".JOURNAL OF PHYSICS D-APPLIED PHYSICS 52.48(2019).
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