期刊
OPTICS EXPRESS
卷 18, 期 16, 页码 16452-16459出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.18.016452
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资金
- Korea Science and Engineering Foundation (KOSEF) [R11-2008-095-01000-0]
- Korea government (MEST) [2009-0071309]
- KICOS [K20815000003]
- Seoul Science Fellowship
- Seoul RBD Program [10543]
- National Research Foundation of Korea [2008-00580, 2008-0062255, 2009-0071309, 2005-0093838, 2008-0062256] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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. (C) 2010 Optical Society of America
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