title: Electrical control of terahertz nano antennas on VO2 thin film.
abstract: 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 (VO(2)), a material that possesses an insulator to metal transition. The nano antennas let terahertz (THz) radiation funnel through when the VO(2) film is in the insulating state. By applying a dc-bias voltage through our device, the VO(2) becomes metallic. This electrically shorts the antennas and therefore switches off the transmission in two distinct regimes: reversible and irreversible switching.
authors: Department of Physics and Astronomy and Center for Subwavelength Optics, Seoul National University,Seoul, 151-747, Republic of Korea. ygjeong@phya.snu.ac.kr
authors: Young-Gyun
authors: YG
authors: Jeong
authors: Hannes
authors: H
authors: Bernien
authors: Ji-Soo
authors: JS
authors: Kyoung
authors: Hyeong-Ryeol
authors: HR
authors: Park
authors: Hyun-Sun
authors: HS
authors: Kim
authors: Jae-Wook
authors: JW
authors: Choi
authors: Bong-Jun
authors: BJ
authors: Kim
authors: Hyun-Tak
authors: HT
authors: Kim
authors: Kwang Jun
authors: KJ
authors: Ahn
authors: Dai-Sik
authors: DS
authors: Kim