Reconfigurable Molecularization of Terahertz Meta-Atoms
- Authors
- Jung, Hyunseung; Jo, Hyunwoo; Lee, Wonwoo; Kang, Moon Sung; Lee, Hojin
- Issue Date
- May-2022
- Publisher
- AMER CHEMICAL SOC
- Keywords
- molecularization; metamaterial; terahertz; ion-gel; graphene
- Citation
- ACS PHOTONICS, v.9, no.5, pp.1814 - 1820
- Journal Title
- ACS PHOTONICS
- Volume
- 9
- Number
- 5
- Start Page
- 1814
- End Page
- 1820
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/42428
- DOI
- 10.1021/acsphotonics.2c00397
- ISSN
- 2330-4022
- Abstract
- Active terahertz metamaterial devices with controllable resonance proper-ties have been commonly investigated. However, owing to the limited tunability of theirfrequencies and low-quality factor resonances, these devices are difficult to adopt as single-devicefilters that can actively adjust diverse spectral information. Moreover, they typicallyrequire complex instrumentation for regulating terahertz waves. In this paper, we proposereconfigurable molecularization of terahertz meta-atoms allowing on-demand realization ofresonance characteristics in a single active terahertz metasurface. This is achieved byselectively controlling the electrical connections between the meta-atoms usingmicropatterned ion-gel gating structures. Based on this operation scheme, the resonancecharacteristics of the terahertz metamaterial can be controlled electrically, and it can serveas a multistate, transmissive metamaterialfilter with resonance frequencies tunable from 0.5to 1.3 THz. In addition, the reconfigurable molecularization of terahertz meta-atoms allowsproducing a transmissive metamaterial showing controllable transmission resonance toterahertz waves. Exploiting the versatility of an active metasurface, we demonstrateterahertz dichromatic vision distinguishing different saccharides without using spectroscopy systems
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