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박형렬

Park, Hyeong‐Ryeol
Laboratory for Ultrafast & Nanoscale Plasmonics
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Nanopattern enabled terahertz all-optical switching on vanadium dioxide thin film

Author(s)
Choi, S. B.Kyoung, J. S.Kim, H. S.Park, Hyeong‐RyeolPark, D. J.Kim, Bong-JunAhn, Y. H.Rotermund, F.Kim, Hyun-TakAhn, K. J.Kim, Dai-Sik
Issued Date
2011-02
DOI
10.1063/1.3553504
URI
https://scholarworks.unist.ac.kr/handle/201301/26266
Fulltext
https://aip.scitation.org/doi/10.1063/1.3553504
Citation
APPLIED PHYSICS LETTERS, v.98, no.7, pp.071105
Abstract
We demonstrate ultrafast all-optical control of terahertz (THz) radiation through nanoresonators, slot antennas with a hundred micron length but submicron width in thin gold layers, fabricated on vanadium dioxide (VO2) thin films. Our THz nanoresonators show almost perfect transmission at resonance. By virtue of phase transition of VO2 from insulating to metallic state, induced in subpicosecond time scale by moderate optical pump, ultrafast control of THz transmission is enabled. This is compared to bare VO2 films where no switching dynamics are observed under similar conditions.
Publisher
AMER INST PHYSICS
ISSN
0003-6951
Keyword
PHASE-TRANSITIONVO2TEMPERATURE

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