Giant nonlinear response of terahertz nanoresonators on VO2 thin film.

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

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

Afiliación

Kyoung J; Center for Subwavelength Optics and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.

Opt Express ; 18(16): 16452-9, 2010 Aug 02.

Article en En | MEDLINE | ID: mdl-20721032

RESUMEN

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: DeltaT/T approximately -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.

Asunto(s)

Nanoestructuras/química; Dispersión de Radiación; Radiación Terahertz; Compuestos de Vanadio/química; Diseño Asistido por Computadora; Diseño de Equipo; Refractometría/instrumentación

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Dispersión de Radiación / Compuestos de Vanadio / Nanoestructuras / Radiación Terahertz Idioma: En Revista: Opt Express Asunto de la revista: OFTALMOLOGIA Año: 2010 Tipo del documento: Article Pais de publicación: Estados Unidos

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