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Title: Multispectral terahertz sensing with highly flexible ultrathin metamaterial absorber
Authors: Yahiaoui, Riad
Tan, Siyu
Cong, Longqing
Singh, Ranjan
Yan, Fengping
Zhang, Weili
Keywords: Refractive index
Terahertz detectors
Dielectric thin films
Issue Date: 2015
Source: Yahiaoui, R., Tan, S., Cong, L., Singh, R., Yan, F., & Zhang, W. (2015). Multispectral terahertz sensing with highly flexible ultrathin metamaterial absorber. Journal of Applied Physics, 118(8), 083103-.
Series/Report no.: Journal of Applied Physics
Abstract: We report the simulation, fabrication, and experimental characterization of a multichannel metamaterial absorber with the aim to be used as a label-free sensing platform in the terahertz regime. The topology of the investigated resonators deposited on a thin flexible polymer by means of optical lithography is capable of supporting multiple resonances over a broad frequency range due to the individual contribution of each sub-element of the unit cell. In order to explore the performance of the chosen structure in terms of sensing phenomenon, the reflection feature is monitored upon variation of the refractive index and the thickness of the analyte. We achieve numerically maximum frequency sensitivity of about 139.2 GHz/refractive index unit. Measurements carried out using terahertz time-domain spectroscopy show good agreement with the numerical predictions. The results are very promising, suggesting a potential use of the metamaterial absorber in wide variety of multispectral terahertz sensing applications.
DOI: 10.1063/1.4929449
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
Rights: © 2015 American Institute of Physics (AIP). This paper was published in Journal of Applied Physics and is made available as an electronic reprint (preprint) with permission of American Institute of Physics (AIP). The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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SPMS Journal Articles

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