Electrical control of terahertz nano antennas on VO2 thin film

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We demonstrate an active metamaterial device that allows to electrically control terahertz transmission over more than one order of magnitude. Our device consists of a lithographically defined gold nano antenna array fabricated on a thin film of vanadium dioxide (VO2), a material that possesses an insulator to metal transition. The nano antennas let terahertz (THz) radiation funnel through when the VO2 film is in the insulating state. By applying a dc-bias voltage through our device, the VO2 becomes metallic. This electrically shorts the antennas and therefore switches off the transmission in two distinct regimes: reversible and irreversible switching.

Original languageEnglish (US)
Pages (from-to)21211-21215
Number of pages5
JournalOptics Express
Issue number22
StatePublished - Oct 24 2011
Externally publishedYes


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