Giant nonlinear response of terahertz nanoresonators on Vo2 thin film

Jisoo Kyoung, Minah Seo, Hyeongryeol Park, Sukmo Koo, Hyun Sun Kim, Youngmi Park, Bong Jun Kim, Kwangjun Ahn, Namkyoo Park, Hyun Tak Kim, Dai Sik Kim

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


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: ΔT/T≈-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.

Original languageEnglish (US)
Pages (from-to)16452-16459
Number of pages8
JournalOptics Express
Issue number16
StatePublished - Aug 2 2010

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