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Open AccessArticle

Electrically Tunable Propagation Properties of the Liquid Crystal-Filled Terahertz Fiber

College of Sciences, Xi’an University of Science and Technology, Xi’an 710054, China
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Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(12), 2487; https://doi.org/10.3390/app8122487
Received: 29 October 2018 / Revised: 20 November 2018 / Accepted: 20 November 2018 / Published: 4 December 2018
(This article belongs to the Special Issue Liquid Crystal THz Photonics: Materials, Devices and Applications)
A bandgap-guiding microstructured fiber for terahertz (THz) radiation was designed by infiltrating the cladding air holes with nematic liquid crystal. Structural parameter dependence of the photonic bandgaps, polarization-dependent bandgap splitting, and electrically tunable propagation properties of the designed fiber were investigated theoretically by using the finite-element method. An external electric field applied across the designed fiber can broaden the effective transmission bandwidth and achieve single-mode single-polarization guidance. Flattened near-zero group-velocity dispersion of 0 ± 1 ps/THz/cm was obtained for the y-polarized fundamental mode within a broad frequency range. Our results provide theoretical references for applications of liquid crystal-filled microstructured fiber for dynamic polarization control and tunable fiber devices in THz frequency. View Full-Text
Keywords: terahertz; microstructured optical fiber; liquid crystal; photonic bandgap; electrical tunability; finite-element method terahertz; microstructured optical fiber; liquid crystal; photonic bandgap; electrical tunability; finite-element method
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MDPI and ACS Style

Wang, D.; Mu, C.; Li, B.; Yang, J. Electrically Tunable Propagation Properties of the Liquid Crystal-Filled Terahertz Fiber. Appl. Sci. 2018, 8, 2487.

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