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- Park, Hyeong‐Ryeol
- Laboratory for Ultrafast & Nanoscale Plasmonics
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Giant nonlinear response of terahertz nanoresonators on VO2 thin film
- Author(s)
- Kyoung, Jisoo, Seo, Minah, Park, Hyeong‐Ryeol, Koo, Sukmo, Kim, Hyun-sun, Park, Youngmi, Kim, Bong-Jun, Ahn, Kwangjun, Park, Namkyoo, Kim, Hyun-Tak, Kim, Dai-Sik
- Issued Date
- 2010-08
- Citation
- OPTICS EXPRESS, v.18, no.16, pp.16452 - 16459
- Abstract
- We report on an order of magnitude enhanced nonlinear response of vanadium dioxide thin film patterned with nanoresonators - nano slot antennas fabricated on the gold film. Transmission of terahertz radiation, little affected by an optical pumping for the case of bulk thin film, can now be completely switched-off: Delta T/T approximate to-0.9999 by the same optical pumping power. This unprecedentedly large optical pump-terahertz probe nonlinearity originates from the insulator-to-metal phase transition drastically reducing the antenna cross sections of the nanoresonators. Our scheme enables nanoscale-thin film technology to be used for all-optical switching of long wavelength light.
- Publisher
- OPTICAL SOC AMER
- ISSN
- 1094-4087
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