In this thesis, we studied the characteristics and applications of a metamaterials resonator based on ohm-ring. In the range of 0.2–1.4 THz, the resonator exhibited two significant resonant peaks, which were shifted with different surface permittivity. We applied this feature to terahertz (THz) sensing. Under a same THz-TDS transmission system, the terahertz spectra of chlorpheniramine maleate could not reflect the content information at all when the concentration was <1%. But this information could be obtained with the aid of the resonator. Our work demonstrates that metamaterials is a sensitive tool for THz sensing, and have the promising potential for the detection for of small quantities of drug, which was hard to detect by direct THz sensing.
Optical and Quantum Electronics – Springer Journals
Published: Jul 8, 2017
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