Terahertz Metamaterial and its Sensing Application

Chen, Q., Hu, X., Xu, G., Zhang, Y. and Cumming, D. R.S. (2016) Terahertz Metamaterial and its Sensing Application. Progress in Electromagnetic Research Symposium (PIERS), Shanghai, China, 8-11 Aug 2016. p. 2392. (doi:10.1109/PIERS.2016.7734982)

Chen, Q., Hu, X., Xu, G., Zhang, Y. and Cumming, D. R.S. (2016) Terahertz Metamaterial and its Sensing Application. Progress in Electromagnetic Research Symposium (PIERS), Shanghai, China, 8-11 Aug 2016. p. 2392. (doi:10.1109/PIERS.2016.7734982)

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Publisher's URL: http://dx.doi.org/10.1109/PIERS.2016.7734982

Abstract

Spatial overlap between the electromagnetic fields and the analytes is a key factor for strong light-matter interaction leading to high sensitivity for label-free optical biosensors. Usually, the exponential fields of cavity modes or surface plasmon resonances are applied to monitor the refractive index variation from bio-reactions. The sensitivity is therefore limited by the influence of local index variation to the weak exponential field. In this paper, by constructing a metallic microstructure array-dielectric-metal (MDM) structure, a novel metamaterial integrated microfluidic (MIM) sensor is demonstrated in terahertz (THz) range, where the dielectric layer of the MDM metamaterial is hollow and acts as the microfluidic channel. Tuning the electromagnetic parameters of metamaterial, greatly confined electromagnetic fields can be obtained in the channel resulting in significantly enhanced interaction between the analytes and the THz wave. A record high sensitivity of 3.5 THz/RIU is predicted by numerical simulation. Normalized the sensitivity to the working frequency, the calculated and measured normalized sensitivity is 0.55/RIU and 0.31/RIU, respectively. The proposed idea to integrate metamaterial and microfluid with a large light-matter interaction can be extended to other frequency regions and has promising applications in biosensing and matter detection.

Item Type:Conference or Workshop Item
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cumming, Professor David
Authors: Chen, Q., Hu, X., Xu, G., Zhang, Y., and Cumming, D. R.S.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
688031Integrated Terahertz Sensors - Newton Advanced FellowshipDavid CummingThe Royal Society (ROYSOC)NA140301ENG - ENGINEERING ELECTRONICS & NANO ENG