Fast switchable ferroelectric liquid crystal gratings with two electro-optical modes

In this article, we reveal a theoretical and experimental illustration of the Ferroelectric liquid crystal (FLC) grating fabricated by mean of patterned alignment based on photo-alignment. The complexity related to the mismatching of the predefined alignment domains on the top and bottom substrate has been avoided by incorporating only one side photo aligned substrate while the other substrate does not have any alignment layer. Depending on the easy axis in the said alignment domains and the azimuth plane of the impinging polarized light, the diffracting element can be tuned in two modes i.e. DIFF/OFF switchable and DIFF/TRANS switchable modes, which can be applied to different applications. The diffraction profile has been illustrated theoretically that fits well with the experimental finding and thus the proposed diffraction elements with fast response time and high diffraction efficiency could find application in many modern devices.

[1]  Hoi Sing Kwok,et al.  Ferroelectric liquid crystals: Excellent tool for modern displays and photonics , 2015 .

[2]  V. Chigrinov,et al.  Ferroelectric Liquid Crystal Cells for Advanced Applications in Displays and Photonics , 2014 .

[3]  Hoi Sing Kwok,et al.  Optimization of alignment quality of ferroelectric liquid crystals by controlling anchoring energy , 2014 .

[4]  Alexander Afanasyev,et al.  Submicron-scale liquid crystal photo-alignment , 2013 .

[5]  Hoi Sing Kwok,et al.  Optically rewritable ferroelectric liquid-crystal grating , 2013 .

[6]  Abhishek Kumar Srivastava,et al.  Fast switchable grating based on orthogonal photo alignments of ferroelectric liquid crystals , 2012 .

[7]  V. Chigrinov,et al.  Switchable liquid crystal grating with sub millisecond response , 2012 .

[8]  Fei Xu,et al.  Liquid crystal gratings based on alternate TN and PA photoalignment. , 2012, Optics express.

[9]  P. Hands,et al.  Fast-switching phase gratings using in-plane addressed short-pitch polymer stabilized chiral nematic liquid crystals , 2011 .

[10]  Vladimir G. Chigrinov,et al.  Single walled carbon nano-tube, ferroelectric liquid crystal composites: Excellent diffractive tool , 2011 .

[11]  Shin-Tson Wu,et al.  High-efficiency and fast-response tunable phase grating using a blue phase liquid crystal. , 2011, Optics letters.

[12]  Tae-Hoon Yoon,et al.  Fast In-Plane Switching of a Liquid Crystal Cell Triggered by a Vertical Electric Field , 2009 .

[13]  C. Umeton,et al.  Short pitch cholesteric electro-optical device based on periodic polymer structures , 2009 .

[14]  Hoi Sing Kwok,et al.  Photoalignment of Liquid Crystalline Materials , 2008 .

[15]  Xinyu Zhu,et al.  High transmittance in-plane switching liquid crystal displays , 2006, Journal of Display Technology.

[16]  Xiao Wei Sun,et al.  Effect of surfactant on the electro-optical properties of holographic polymer dispersed liquid crystal Bragg gratings , 2005 .

[17]  O. Lavrentovich,et al.  Switchable two-dimensional gratings based on field-induced layer undulations in cholesteric liquid crystals. , 2005, Optics letters.

[18]  Chia-Roong Lee,et al.  Optically switchable biphotonic photorefractive effect in dye-doped liquid crystal films , 2004 .

[19]  H. L. Cheung,et al.  Optimization of photo‐aligned ferroelectric liquid‐crystal display under passively addressed driving , 2004 .

[20]  Vincent P. Tondiglia,et al.  Electrically switchable volume gratings in polymer‐dispersed liquid crystals , 1994 .

[21]  M. Handschy,et al.  Diffractive ferroelectric liquid-crystal shutters for unpolarized light. , 1991, Optics letters.

[22]  L. Beresnev.  Demonstration set-up for a fast switchable diffraction of laser light using the computer controlled diffraction grating based on ferroelectric liquid crystal , 1995 .