title: Giant nonlinear response of terahertz nanoresonators on VO2 thin film.
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: 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.
authors: Center for Subwavelength Optics and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
authors: Jisoo
authors: J
authors: Kyoung
authors: Minah
authors: M
authors: Seo
authors: Hyeongryeol
authors: H
authors: Park
authors: Sukmo
authors: S
authors: Koo
authors: Hyun-sun
authors: HS
authors: Kim
authors: Youngmi
authors: Y
authors: Park
authors: Bong-Jun
authors: BJ
authors: Kim
authors: Kwangjun
authors: K
authors: Ahn
authors: Namkyoo
authors: N
authors: Park
authors: Hyun-Tak
authors: HT
authors: Kim
authors: Dai-Sik
authors: DS
authors: Kim
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D049329:Nanostructures / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation; D012542:Scattering, Radiation; D055053:Terahertz Radiation; D017968:Vanadium Compounds / Q000737:chemistry*
chemical_list: D017968:Vanadium Compounds