Abstract
A tri-layer metamaterial absorber, composed of a metal structure/dielectric spacer/vanadium dioxide (VO2) ground plane, is shown to switch reversibly between reflective and absorptive states as a function of temperature. The VO2 film, which changes its conductivity by four orders of magnitude across a insulator-metal transition at about 68 °C, enables the switching by forming a resonant absorptive structure at high temperatures while being inactive at low temperatures. The fabricated metamaterial shows a modulation of the reflectivity levels of 58% at a frequency of 22.5 THz and 57% at a frequency of 34.5 THz.
Original language | English |
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Pages (from-to) | 154-157 |
Number of pages | 4 |
Journal | Optics Communications |
Volume | 346 |
DOIs | |
State | Published - 1 Jul 2015 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2015 Elsevier B.V. All rights reserved.
Funding
Funding from DRDO, India , under Grant no. DECS/15/15124/D(R&D)/CARS-1 is gratefully acknowledged.
Funders | Funder number |
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Defence Research and Development Organisation |
Keywords
- Phase change material
- Switching
- Tunable metamaterial