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Park, Hyeong‐Ryeol
Laboratory for Ultrafast & Nanoscale Plasmonics
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Active Terahertz Nanoantennas Based on VO2Phase Transition

Author(s)
Seo, MinahKyoung, JisooPark, Hyeong‐RyeolKoo, SukmoKim, Hyun-sunBernien, HannesKim, Bong JunChoe, Jong HoAhn, Yeong HwanKim, Hyun-TakPark, NamkyooPark, Q-HanAhn, KwangjunKim, Dai-Sik
Issued Date
2010-06
DOI
10.1021/nl1002153
URI
https://scholarworks.unist.ac.kr/handle/201301/26271
Fulltext
https://pubs.acs.org/doi/10.1021/nl1002153
Citation
NANO LETTERS, v.10, no.6, pp.2064 - 2068
Abstract
Unusual performances of metamaterials such as negative index of refraction, memory effect, and cloaking originate from the resonance features of the metallic composite atom1−6. Indeed, control of metamaterial properties by changing dielectric environments of thin films below the metallic resonators has been demonstrated7−11. However, the dynamic control ranges are still limited to less than a factor of 10,7−11 with the applicable bandwidth defined by the sharp resonance features. Here, we present ultra-broad-band metamaterial thin film with colossal dynamic control range, fulfilling present day research demands. Hybridized with thin VO2 (vanadium dioxide)(12-18) films, nanoresonator supercell arrays designed for one decade of spectral width in terahertz frequency region show an unprecedented extinction ratio of over 10000 when the underlying thin film experiences a phase transition. Our nanoresonator approach realizes the full potential of the thin film technology for long wavelength applications.
Publisher
American Chemical Society (ACS)
ISSN
1530-6984
Keyword (Author)
Terahertz spectroscopyterahertz VO2nanoantennaphase transition deviceterahertz active device
Keyword
NEAR-FIELDOPTICAL-TRANSMISSIONTHIN-FILMSSPECTROSCOPYMETAMATERIALSTEMPERATUREENHANCEMENTPOLARIZERDEVICESLIGHT

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