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Giant nonlinear response of terahertz nanoresonators on Vo2 thin film
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نویسنده
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kyoung j. ,seo m. ,park h. ,koo s. ,kim h.-s. ,park y. ,kim b.-j. ,ahn k. ,park n. ,kim h.-t. ,kim d.-s.
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منبع
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optics express - 2010 - دوره : 18 - شماره : 16 - صفحه:16452 -16459
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چکیده
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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. © 2010 optical society of america.
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آدرس
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center for subwavelength optics,department of physics and astronomy,seoul national university,seoul 151-747, South Korea, center for subwavelength optics,department of physics and astronomy,seoul national university,seoul 151-747, South Korea, center for subwavelength optics,department of physics and astronomy,seoul national university,seoul 151-747, South Korea, photonic systems laboratory,school of eecs,seoul national university,seoul 151-744, South Korea, center for subwavelength optics,department of physics and astronomy,seoul national university,seoul 151-747, South Korea, center for subwavelength optics,department of physics and astronomy,seoul national university,seoul 151-747, South Korea, metal-insulator transition lab.,etri,daejeon 305-350, South Korea, center for subwavelength optics,department of physics and astronomy,seoul national university,seoul 151-747, South Korea, photonic systems laboratory,school of eecs,seoul national university,seoul 151-744, South Korea, metal-insulator transition lab.,etri,daejeon 305-350, South Korea, center for subwavelength optics,department of physics and astronomy,seoul national university,seoul 151-747, South Korea
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Authors
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