Giant nonlinear response of terahertz nanoresonators on VO_2 thin film | Zendy

Jisoo Kyoung | Zendy; Minah Seo | Zendy; HyeongRyeol Park | Zendy; Sukmo Koo | Zendy; Hyun-sun Kim | Zendy; Young-Mi Park | Zendy; Bong-Jun Kim | Zendy; Kwangjun Ahn | Zendy; Namkyoo Park | Zendy; HyunTak Kim | Zendy; DaiSik Kim | Zendy

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Giant nonlinear response of terahertz nanoresonators on VO_2 thin film

Author(s) -

Jisoo Kyoung,

Minah Seo,

HyeongRyeol Park,

Sukmo Koo,

Hyun-sun Kim,

Young-Mi Park,

Bong-Jun Kim,

Kwangjun Ahn,

Namkyoo Park,

HyunTak Kim,

DaiSik Kim

Publication year - 2010

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.18.016452

Subject(s) - terahertz radiation , materials science , thin film , optoelectronics , optics , nonlinear optics , nanoscopic scale , wavelength , nanotechnology , laser , physics

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.

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