Terahertz optical characteristics of two types of metamaterials for molecule sensing
- 주제(기타) Optics
- 설명문(일반) [Roh, Yeeun; Lee, Sang-Hun; Seo, Minah] KIST, Sensor Syst Res Ctr, Seoul 02792, South Korea; [Roh, Yeeun; Ju, Byeong-Kwon] Korea Univ, Coll Engn, Display & Nano Syst Lab, Seoul 02841, South Korea; [Kang, Boyoung] Ctr Adv Metamat, Daejeon 34103, South Korea; [Wu, Jeong Weon] Ewha Womans Univ, Dept Phys, Seoul 03760, South Korea; [Seo, Minah] Korea Univ Sci & Technol, KIST Sch, Div Nano & Informat Technol, Seoul 02792, South Korea
- 등재 SCIE, SCOPUS
- OA유형 gold
- 발행기관 OPTICAL SOC AMER
- 발행년도 2019
- URI http://www.dcollection.net/handler/ewha/000000159678
- 본문언어 영어
- Published As http://dx.doi.org/10.1364/OE.27.019042
- PubMed https://pubmed.ncbi.nlm.nih.gov/31252836
초록/요약
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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