Potential applications of nematic liquid crystal materials in the millimeter wave region

2006 ◽  
Author(s):  
T. Nose ◽  
S. Saito ◽  
S. Yanagihara ◽  
M. Honma
Keyword(s):  
Liquid Crystal ◽  
Millimeter Wave ◽  
Nematic Liquid Crystal ◽  
Potential Applications ◽  
Wave Region ◽  
Liquid Crystal Materials

Bistable nematic liquid crystal device with flexoelectric switching

2006 ◽  
Vol 17 (4) ◽  
pp. 435-463 ◽  
Author(s):  
L. J. CUMMINGS ◽  
G. RICHARDSON
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Nematic Liquid Crystal ◽  
Liquid Crystal Display ◽  
Parallel Plates ◽  
Stable States ◽  
Numerical Work ◽  
Potential Applications ◽  
Simplifying Assumptions ◽  
Bistable Device

Motivated generally by potential applications in the liquid crystal display industry [8,35], and specifically by recent experimental, theoretical and numerical work [6,7,13,14,21,25,30,31], we consider a thin film of nematic liquid crystal (NLC), sandwiched between two parallel plates. Under certain simplifying assumptions, laid out in £2, we find that for monostable surfaces (i.e. only a single preferred director anchoring angle at each surface), two optically-distinct, steady, stable (equal energy) configurations of the director are achievable, that is, a bistable device. Moreover, it is found that the stability of both of these steady states may be destroyed by the application of a sufficiently large electric field, and that switching between the two states is possible, via the flexoelectric effect. Such a phenomenon could be used in NLC display devices, to reduce power consumption drastically. Previous theoretical demonstrations of such (switchable) bistable devices have either relied on having bistable bounding surfaces, that is, surfaces at which there are two preferred director orientations at the surface [7,14]; on having special (nonplanar) surface morphology within the cell that allows for two stable states (the zenithal bistable device (ZBD) [4,21], or, in the case of the Nemoptic BiNem technology [11,19], on flow effects and a very carefully applied electric field to effect the switching.

Microwave tunable split ring resonator bandpass filter using nematic liquid crystal materials

Optik ◽  
2016 ◽  
Vol 127 (21) ◽  
pp. 10216-10222 ◽  
Author(s):  
Yupeng Liu ◽  
Di Jiang ◽  
Weiping Cao ◽  
Tao Yang ◽  
Lei Xia ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Bandpass Filter ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Split Ring ◽  
Liquid Crystal Materials

POINT DEFECTS IN NEMATIC LIQUID CRYSTAL MATERIALS WITH CONICAL ANCHORING AT THE INTERFACE

2020 ◽  
Vol 21 (3) ◽  
pp. 433-440
Author(s):  
M. N. Krakhalev ◽  
◽  
V. F. Shabanov ◽  
V. Ya. Zyryanov ◽  
◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Point Defects ◽  
Liquid Crystal Materials
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