Periodic nanostructure-induced change of director profiles and variable stop bands of photonic crystals infiltrated by nematic liquid crystals

2019 ◽  
Vol 58 (36) ◽  
pp. 9846
Author(s):  
Sibo Chen ◽  
Xuan Zhou ◽  
Wenjiang Ye ◽  
Zhidong Zhang
Keyword(s):  
Liquid Crystals ◽  
Photonic Crystals ◽  
Nematic Liquid Crystals ◽  
Periodic Nanostructure

Tunable and programmable topological valley transport in photonic crystals with liquid crystals

2022 ◽  
Author(s):  
Yulin Zhao ◽  
Feng Liang ◽  
Xiangru Wang ◽  
Deshuang Zhao ◽  
Bing-Zhong Wang
Keyword(s):  
Wave Propagation ◽  
Liquid Crystals ◽  
Photonic Crystals ◽  
Symmetry Breaking ◽  
Relative Permittivity ◽  
Nematic Liquid Crystals ◽  
Inversion Symmetry ◽  
Edge States ◽  
Beam Splitting ◽  
Topological Transition

Abstract Topological valley transport in photonic crystals (PCs) has attracted great attention owing to its edge modes immune to backscattering. However, flexibly dynamically controlling and reconfiguring the pathway of the topological one-way propagation is still challenging. Here, we propose a tunable and programmable valley PC structure based on nematic liquid crystals (LCs). Inversion symmetry breaking and topological transition are implemented through controlling the relative permittivity of the LC cells. Topological protection of valley edge states and valley-locked beam splitting are demonstrated. Moreover, the LC-based PC can be discretized to a number of supercells, each of which can be coded with “0” or “1”. The wave propagation pathway can be dynamically reconfigured by programming different coding patterns.

Director fields of nematic liquid crystals in tunable photonic crystals

2005 ◽  
Author(s):  
Heinz-Siegfried Kitzerow ◽  
Guido Mertens ◽  
Heinrich Matthias ◽  
Heinrich Marsmann ◽  
Ralf B. Wehrspohn ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Photonic Crystals ◽  
Nematic Liquid Crystals

The electrohydrodynamic instability in twisted nematic liquid crystals

1994 ◽  
Vol 4 (2) ◽  
pp. 239-252 ◽  
Author(s):  
A. Hertrich ◽  
A. P. Krekhov ◽  
O. A. Scaldin
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Electrohydrodynamic Instability ◽  
Twisted Nematic

Surface disclinations in nematic liquid crystals

1975 ◽  
Vol 36 (1) ◽  
pp. 59-67 ◽  
Author(s):  
V. Vitek ◽  
M. Kléman
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals

STUDY OF NEMATIC LIQUID CRYSTALS BY MEANS OF THE GUEST DYE DICHROISM

1975 ◽  
Vol 36 (C1) ◽  
pp. C1-69-C1-76 ◽  
Author(s):  
L. M. BLINOV ◽  
V. A. KIZEL ◽  
V. G. RUMYANTSEV ◽  
V. V. TITOV
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals
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