BROWSE
Detail
Journal Article
Electrically Controllable Terahertz Square-loop Metamaterial based on VO2 Thin Film
Cited 69 time in 
Share 
Share
- Authors
- Jun-Hwan Shin, Kyung Hyun Park, Han-Cheol Ryu
- Issue Date
- 2016-05
- Citation
- Nanotechnology, v.27, no.19, pp.1-8
- ISSN
- 0957-4484
- Publisher
- Institute of Physics (IOP)
- Language
- English
- Type
- Journal Article
- Abstract
- An electrically controllable square-loop metamaterial based on vanadium dioxide (VO2) thin film was proposed in the terahertz frequency regime. The square-loop shaped metamaterial was adopted to perform roles not only as a resonator but also as a micro-heater for the electrical control of the VO2. A dual-resonant square-loop structure was designed to realize band-pass characteristics in the desired frequency band. The measured Q-factors of the basic and scaled-down metamaterials fabricated on VO2 thin films were 2.22 and 1.61 at the center frequencies of 0.44 and 1.14 THz in the passbands, respectively. The transmittances of the proposed metamaterial were successfully controlled by applying a bias voltage without an external heater. The measured transmittance on-off ratios of the metamaterials were over 40 at the center frequencies in the passbands. In the future, electrically controllable terahertz metamaterial based on VO2 metamaterial could be employed as high-performance active filters or sensors.
- KSP Keywords
- Active filters, Band-pass, Bias voltage, Center frequency, Electrical control, External heater, High performance, Loop structure, Micro-heater, On-off, Q factor