Flexible Thz Metamaterials Bonded To Paper For Chemical Sensing

Rhiannon Lees,Michael Cooke,Claudio Balocco,Andrew J. Gallant

2019 44TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ)（2019）

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Abstract

We report on Ilk tnetatnaterials for chemical sensing fabricated on low-loss, plastic, flexible substrates. The metamaterial is bonded to a paper sheet, which is saturated with the liquid to he analysed. Liquids in contact with the metamaterial surface with different refractive indices result in a shift of the metamaterial resonant frequency. This shift in frequency can be detected by measuring its complex transmission using a THz vector network analyser, in the frequency range 0.75-1.1 THz. The sensitivity of the metamaterial is 0.0015 refractive index units for a spectral resolution of 1 GHz which is well achievable with the VNA system.

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Key words

flexible THz metamaterials,metamaterial resonant frequency,refractive indices,metamaterial surface,paper sheet,flexible substrates,chemical sensing,THz vector network analyser,frequency 0.75 THz to 1.1 THz

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