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Terahertz optical characteristics of two types of metamaterials for molecule sensing

Authors
Roh, YeeunLee, Sang-HunKang, BoyoungWu, Jeong WeonJu, Byeong-KwonSeo, Minah
Issue Date
24-6월-2019
Publisher
OPTICAL SOC AMER
Citation
OPTICS EXPRESS, v.27, no.13, pp.19042 - 19049
Indexed
SCIE
SCOPUS
Journal Title
OPTICS EXPRESS
Volume
27
Number
13
Start Page
19042
End Page
19049
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/64734
DOI
10.1364/OE.27.019042
ISSN
1094-4087
Abstract
We investigate spectral responses of two different terahertz (THz) metamaterials of double split ring resonator (DSRR) and the nano slot resonator (NSR) for molecule sensing in low concentration. Two different resonant frequencies of DSRR can be controlled by polarization angle of incident THz beam. For comparison of THz optical characteristics, two NSRs were made as showing the same resonant frequencies as DSRR's multimode. The monosaccharide molecules of glucose and galactose were detected by these two types of metamaterials matching the resonant frequencies in various concentration. NSR shows higher sensitivity in very low concentration range rather than DSRR, although the behavior was easily saturated in terms of concentration. In contrast, DSRR can cover more broad concentration range with clear linearity especially under high quality factor mode in polarization of 67.5 degree due to the Fano resonance. THz field enhancement distributions were calculated to investigate sensing performance of both sensing chips in qualitative and quantitative manner. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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College of Engineering > School of Electrical Engineering > 1. Journal Articles
Graduate School > KU-KIST Graduate School of Converging Science and Technology > 1. Journal Articles

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Ju, Byeong kwon
공과대학 (전기전자공학부)
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