Electrically tunable liquid-crystal photonic crystal fiber

By Fang Du, Yan-qing Lu, Shin‐Tson Wu. 2004

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Recent progress and novel applications of photonic crystal fibers (2010, background): “electrical tuning devices [75], all-optical modulators [76], optical signal processing [72], nonlinear applications [77] and tunable birefringent fibers [78].”
Modulation of photonic structures by surface acoustic waves (2005, background): “The electric control of the optical properties has also been demonstrated in optical fibres by Du et al [21] and in porous-silicon microcavities infiltrated with a liquid crystal [22].”
Influence of temperature and electrical fields on propagation properties of photonic liquid-crystal fibres (2006, unknown): “In contrast, the refractive index of the cladding region in the hollow-core PCFs is higher than the index of the core, since in this case the light is confined within the core by the photonic band gap (PBG) phenomenon.”
Hybrid photonic-crystal fiber (2017, background): “In 2004, Du et al. reported for the first time the development of tunable light switch using a photonic crystal fiber filled with nematic LC (Du et al., 2004).”
Electrically tunable photonic bandgap guidance in a liquid-crystal-filled photonic crystal fiber (2005, result): “Polarization microscopy studies of an NLC-filled silica tube with 6- m inner diameter and 130- m outer diameter indicate planar alignment of the NLC, with the director parallel to the fiber axis, in agreement with previous observations [5].”