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Journal Article
Nanopattern Enabled Terahertz All-Optical Switching on Vanadium Dioxide Thin Film
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- Authors
- S. B. Choi, J. S. Kyoung, H. S. Kim, H. R. Park, D. J. Park, Bong-Jun Kim, Y. H. Ahn, F. Rotermund, Hyun-Tak Kim, K. J. Ahn, D. S. Kim
- Issue Date
- 2011-02
- Citation
- Applied Physics Letters, v.98, no.7, pp.1-3
- ISSN
- 0003-6951
- Publisher
- American Institute of Physics (AIP)
- Language
- English
- Type
- Journal Article
- 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. © 2011 American Institute of Physics.
- KSP Keywords
- Metallic state, Phase transition, Slot Antenna, Terahertz (THz) radiation, Time Scale, Vanadium dioxide thin film, all-optical control, all-optical switching, optical pump, switching dynamics, thin film(TF)