High‐speed light valve using an amorphous silicon photosensor and ferroelectric liquid crystals

1987 ◽  
Vol 51 (16) ◽  
pp. 1233-1235 ◽  
Author(s):  
N. Shin‐ichi Takahashi ◽  
Hideki Asada ◽  
Masaki Miyahara ◽  
Shoichi Kurita ◽  
Hiroyuki Kuriyama
Keyword(s):  
Liquid Crystals ◽  
Amorphous Silicon ◽  
High Speed ◽  
Ferroelectric Liquid Crystals ◽  
Light Valve

Alternative Complex Liquid Crystal Displays

1989 ◽  
Vol 149 ◽  
Author(s):  
E P Raynes
Keyword(s):  
Thin Film ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Amorphous Silicon ◽  
Thin Film Transistors ◽  
Liquid Crystal Displays ◽  
Ferroelectric Liquid Crystals ◽  
Alternative Technologies ◽  
Complex Liquid ◽  
Major Progress

ABSTRACTThe first major progress towards complex LCD's has been made using arrays of thin film transistors (TFT's) fabricated using amorphous silicon (a - Si) technology. However, apart from other two and three terminal devices, there are also two new LCD technologies which directly improve the performance of the LCD without the need for extra switching elements. These are the supertwist (or STN) LCD and displays based on ferroelectric liquid crystals (FELC). These two alternative technologies are described and teir performance compared with that of displays fabricated using α - Si TFT's.

Deformed Helix Ferroelectric Liquid Crystals with Large Tilt Angles in Optically Addressed Spatial Light Modulators for Dynamical Holography Applications

1997 ◽  
Vol 488 ◽  
Author(s):  
L. A. Beresnev ◽  
W. Haase ◽  
A. P. Onokhov ◽  
W. Dultz ◽  
M. V. Isaev ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Liquid Crystals ◽  
Amorphous Silicon ◽  
Diffraction Efficiency ◽  
Optical Axis ◽  
Polymeric Films ◽  
Spatial Light Modulators ◽  
Ferroelectric Liquid Crystals ◽  
Holographic Image ◽  
Light Modulators

AbstractOptically addressed spatial light modulators (OASLMs) based on deformed helix ferroelectric liquid crystals (DHFLC) with high tilt angles on order of 40° and helical pitches less than 0.2μm were developed. The diffraction efficiency reached the order of 20%. The light induced deviation of the optical axis of the DHFLC layer was measured in sandwich structures consisting of photoconductors and liquid crystals. The photoelectric parameters of photoconductive amorphous silicon carbide a-SiC:H and a photoconductive polymeric films were measured with and without light blocking and reflecting layers. The application of the developed OASLMs in a holographic image corrector was demonstrated.

Ferroelectric Liquid Crystals for Nonlinear Optics: can we Really do It?

1995 ◽  
Vol 392 ◽  
Author(s):  
David M. Walba ◽  
Daniel J. Dyer ◽  
Peter L. Cobben ◽  
Teresa Sierra ◽  
James A. Rego ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
High Speed ◽  
Polar Axis ◽  
Ferroelectric Liquid Crystals ◽  
Polar Structure ◽  
Molecular Dipole ◽  
Electro Optic ◽  
Interesting Candidate ◽  
Disperse Red 1 ◽  
Initial Results

AbstractFerroelectric liquid crystals (FLCs) are true liquids with a thermodynamically stable polar structure. Furthermore, in some systems excellent polar stereocontrol has been demonstrated (> 80% of the molecular dipole oriented along the polar axis with infinite “thermal stability”). These properties make FLCs an interesting candidate for second order NLO applications. However, until now the orientation of organic functional arrays with “large β”, typified by the disperse red 1 (DRI) chromophore, has not been demonstrated.Herein we report the initial results of a study directed towards providing a solution to this problem. Specifically, a new FLC dopant wherein the DRI chromophore (p-nitro-p'-dialkyl-aminoazobenzene unit) is oriented along the polar axis in FLC mixtures up to 30% by weight is described. These results suggest that it will be possible to obtain FLCs with good stereocontrolled orientation of large β functional arrays. Given that hybrid VLSI silicon/FLC optical chips are under intense investigation as micro-displays, and manufacturing issues for this class of devices are being addressed in the display context, the materials presented here suggest VLSI/FLC chips may be useful as high speed electro-optic modulators as well.

Advances in ferroelectric liquid crystals for high-speed spatial-light modulators

1994 ◽  
Author(s):  
A. L. Andreev ◽  
Natalia I. Chernova ◽  
Igor N. Kompanets ◽  
M. V. Loseva ◽  
Alexander V. Parfenov ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
High Speed ◽  
Spatial Light Modulators ◽  
Ferroelectric Liquid Crystals ◽  
Light Modulators

scholarly journals High-speed infrared phase modulators using short helical pitch ferroelectric liquid crystals

2005 ◽  
Vol 13 (20) ◽  
pp. 7732 ◽  
Author(s):  
Ju-Hyun Lee ◽  
Dong-Woo Kim ◽  
Yung-Hsun Wu ◽  
Chang-Jae Yu ◽  
Sin-Doo Lee ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
High Speed ◽  
Ferroelectric Liquid Crystals ◽  
Helical Pitch ◽  
Phase Modulators
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