Photorefractive effect in ferroelectric liquid crystals containing oligo-thiophene chiral compounds

2013 ◽  
Author(s):  
Takeo Sasaki ◽  
Masashi Ikegami ◽  
Satoshi Kajikawa ◽  
Yumiko Naka
Keyword(s):  
Liquid Crystals ◽  
Photorefractive Effect ◽  
Ferroelectric Liquid Crystals ◽  
Chiral Compounds

Dynamic amplification of light signals in photorefractive ferroelectric liquid crystalline mixtures

2014 ◽  
Vol 174 ◽  
pp. 203-218 ◽  
Author(s):  
Takeo Sasaki ◽  
Satoshi Kajikawa ◽  
Yumiko Naka
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Photorefractive Effect ◽  
Gain Coefficient ◽  
Ferroelectric Liquid Crystals ◽  
Time Dynamic ◽  
Chiral Compounds ◽  
Smectic C ◽  
Dynamic Amplification

The photorefractive effect in photoconductive ferroelectric liquid crystals that contain photoconductive chiral compounds was investigated. Terthiophene compounds with chiral structures were chosen as the photoconductive chiral compounds, and they were mixed with an achiral smectic C liquid crystal. The mixtures exhibit the ferroelectric chiral smectic C phase. The photorefractivity of the mixtures was investigated by two-beam coupling experiments. It was found that the ferroelectric liquid crystals containing the photoconductive chiral compound exhibit a large gain coefficient of over 1200 cm−1 and a fast response time of 1 ms. Real-time dynamic amplification of an optical image signal of over 30 fps using the photorefractive ferroelectric liquid crystal was demonstrated.

Photorefractive effect of polymer-stabilized ferroelectric liquid crystals

2009 ◽  
Author(s):  
Takeo Sasaki ◽  
Atsushi Katsuragi ◽  
Hirotada Hazato ◽  
Yukihito Nakazawa
Keyword(s):  
Liquid Crystals ◽  
Photorefractive Effect ◽  
Ferroelectric Liquid Crystals ◽  
Polymer Stabilized

Photorefractive effect of ferroelectric liquid crystals (Invited Paper)

2005 ◽  
Author(s):  
Takeo Sasaki ◽  
Oki Mochizuki ◽  
Kazunori Noborio ◽  
Tatsuya Abe ◽  
Yukihito Nakazawa
Keyword(s):  
Liquid Crystals ◽  
Photorefractive Effect ◽  
Ferroelectric Liquid Crystals

Spontaneous Polarization Reorientation Photorefractive Effect in Ferroelectric Liquid Crystals

2004 ◽  
Vol 410 (1) ◽  
pp. 117-127
Author(s):  
Takeo Sasaki ◽  
Atsushi Katsuragi ◽  
Yukihito Nakazawa ◽  
Godai Fukunaga ◽  
Shintaro Yoshimura
Keyword(s):  
Liquid Crystals ◽  
Spontaneous Polarization ◽  
Photorefractive Effect ◽  
Ferroelectric Liquid Crystals

Spontaneous polarization-vector-reorientation photorefractive effect in ferroelectric liquid crystals

2001 ◽  
Vol 78 (26) ◽  
pp. 4112-4114 ◽  
Author(s):  
Takeo Sasaki ◽  
Yuji Kino ◽  
Minoru Shibata ◽  
Naoko Mizusaki ◽  
Atsushi Katsuragi ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Spontaneous Polarization ◽  
Photorefractive Effect ◽  
Polarization Vector ◽  
Ferroelectric Liquid Crystals
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