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Toroidal metasurfaces integrated with microfluidic for terahertz refractive index sensing
Chen, Xu1; Fan, Wenhui1,2,3
Department瞬态光学技术国家重点实验室
2019-11-27
Source PublicationJOURNAL OF PHYSICS D-APPLIED PHYSICS
ISSN0022-3727;1361-6463
Volume52Issue:48
Contribution Rank1
Abstract

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
DOI10.1088/1361-6463/ab3ea0
Indexed BySCI
Language英语
WOS IDWOS:000485742400003
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.opt.ac.cn/handle/181661/31865
Collection瞬态光学技术国家重点实验室
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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