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 language | English |
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Pages (from-to) | 1-5 |
Number of pages | 5 |
Journal | Optics Express |
Volume | 19 |
Issue number | 22 |
Publication status | Published - 2011 |
Keywords
- CWTS 0.75 <= JFIS < 2.00