Electrical control of terahertz nano antennas on VO2 thin film

Young Gyun Jeong, Hannes Bernien, Ji Soo Kyoung, Hyeong Ryeol Park, Hyun Sun Kim, Jae Wook Choi, Bong Jun Kim, Hyun Tak Kim, Kwang Jun Ahn, Dai Sik Kim

Research output: Contribution to journalArticlepeer-review

72 Scopus citations

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 (US)
Pages (from-to)21211-21215
Number of pages5
JournalOptics Express
Volume19
Issue number22
DOIs
StatePublished - Oct 24 2011

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