Electrical control of terahertz nano antennas on VO2 thin film

Journal article (2011)

Authors

YG Jeong External organisation
H. Bernien QN/Quantum Transport
J Kyoung External organisation
HR Park External organisation
HS Kim External organisation
JW Choi External organisation
BJ Kim External organisation
HT Kim External organisation
K.J. Ahn External organisation
DS Kim Engineering Thermodynamics - Mechanical, Maritime and Materials Engineering
Research Group
QN/Quantum Transport
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Published Date

2011

Language

English

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Research Group

QN/Quantum Transport

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.