期刊
APPLIED PHYSICS LETTERS
卷 102, 期 15, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4801648
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资金
- State Key Laboratory of Millimeter Waves at the City University of Hong Kong
- Micro technology Laboratory at University of Washington
This paper describes and demonstrates a terahertz (THz) frequency tunable fishnet metamaterial (TFMM) using an electrically controlled polymer dispersed liquid crystal (PDLC) matrix. In contrast to other PDLC-based devices, the TFMM employs a novel method for encapsulating PDLC using a thin (1.5 mu m) polyimide skin layer to form a uniform surface for metal electrodes while minimizing the Fabry-Perot effect of the skin layer on the TFMM measurements. The tunability was verified by measuring the frequency shift in the reflection coefficient (0.01 THz), with an observed minimum negative refractive index of -15 at 0.55 THz. (C) 2013 AIP Publishing LLC [http://dx.doi.org/10.1063/1.4801648]
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