期刊
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES
卷 35, 期 2, 页码 198-207出版社
SPRINGER
DOI: 10.1007/s10762-013-0036-x
关键词
Terahertz sensing; Metamaterial sensor
资金
- Ministry of Education, Science, Sports and Culture [22109003, 25706026, 25287072]
- Inamori Foundation
- Japan Science and Technology Agency (JST)
- Grants-in-Aid for Scientific Research [25706026, 22109003, 25287072] Funding Source: KAKEN
We demonstrate the highly sensitive terahertz (THz) sensing of a water-glycerol mixture poured on a metamaterial surface using reflection-based THz time domain spectroscopy. The reflectance at the resonant dip frequency changes significantly with glycerol concentration. The detection sensitivity is about 8 times higher than that compared to the case without a metamaterial structure. We also investigate how sensitivity depends on the Q factor of the metamaterial resonance for highly absorptive media, such as a water solution in the THz region.
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