Electrical control of terahertz nano antennas on VO2 thin film

YG Jeong, H Bernien, J Kyoung, HR Park, HS Kim, JW Choi, BJ Kim, HT Kim, K.J. Ahn, DS Kim

Research output: Contribution to journalArticleScientificpeer-review

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 (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
Pages (from-to)1-5
Number of pages5
JournalOptics Express
Volume19
Issue number22
Publication statusPublished - 2011

Keywords

  • CWTS 0.75 <= JFIS < 2.00

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