Effect of surfactant on the electro-optical properties of holographic polymer dispersed liquid crystal Bragg gratings

Liu, Y.J.; Sun, Xiao Wei; Dai, Hai Tao; Liu, J.H.; Xu, Kang

doi:10.1016/j.optmat.2004.10.010

Cited by 77 publications

(23 citation statements)

References 13 publications

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“…Due to the easy tunability of refractive index, LC is also very popular for photonic devices like beam multiplexing, optical interconnects, tunable grating etc., a lot of efforts have been made to improve their performance. [1][2][3][4][5][6][7] Recently, numbers of LC gratings have been studied to optimize high diffraction efficiency and small response time. One of the most common methods includes integration of an array of striped electrodes which patterned on single or both sides of the LC cell that generate longitudinal or lateral periodic electric field distributions and thus control the director of vertically aligned LCs, locally.…”

Section: Introductionmentioning

confidence: 99%

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

Ma¹,

Wang

Srivastava³

et al. 2016

AIP Advances

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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.

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Section: Introductionmentioning

confidence: 99%

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

Ma¹,

Wang

Srivastava³

et al. 2016

AIP Advances

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“…For example, electrically driven H-PDLCs demand a high electric field (10−20 V/ µm) due to the high surface area to volume ratio of small LC droplets. [20][21][22] This becomes problematic because the wholly organic nature of H-PDLC devices makes them vulnerable to high electric fields, thereby forestalling practical application. In addition, optically driven devices show a propensity for poor optical contrast.…”

Section: Introductionmentioning

confidence: 99%

Holographically Formed, Acoustically Switchable Gratings Based on Polymer-Dispersed Liquid Crystals

Liu

Ding

et al. 2013

SLAS Technology

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“…Polyethylene glycol(PEG)-based polymer-dispersed liquid crystal (PDLC) films consist of micron-size spheroidal liquid crystal (LC) droplets imbedded in a polymer matrix and these have been the subject of interest related to light control applications and electronic displays for the last few decades [1][2][3][4][5][6]. These films can be switched from a highly scattering state to a transmissive form through the application of a small external electric field [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

The investigation of molecular affinity involved in poly(ethylene glycol)-based polymer-dispersed liquid crystal display

et al. 2011

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Acrylic polyethylene glycol(PEG)-based polymer-dispersed liquid crystal (PDLC) films have been fabricated to investigate the effect of intermolecular interactions on PDLC performance. For this purpose, the amphiphilic liquid crystal and polymers are selected as PDLC composite materials. The acrylic PEG contents are varied from 0 to 66.66 mol wt.% in order to understand the effects of different levels of additions on the microstructure and electro-optical properties of the PDLC films. For this intention, polarized optical microscopy and UV-vis spectroscopy are used. The extent of phase separation and anchoring energy are also examined using Fourier transform infrared (FTIR) spectroscopy and contact angle measurements in consequence of acrylic PEG addition. The contrast ratio, threshold voltage, as well as saturation voltage, tended to increase with the addition of acrylic PEG. The molecular affinity involved in the polymer matrix and LC molecules affected the phase separation which is responsible for the formation of domain size; this accordingly changed the electro-optical properties of PDLC film.

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Effect of surfactant on the electro-optical properties of holographic polymer dispersed liquid crystal Bragg gratings

Cited by 77 publications

References 13 publications

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

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

Holographically Formed, Acoustically Switchable Gratings Based on Polymer-Dispersed Liquid Crystals

The investigation of molecular affinity involved in poly(ethylene glycol)-based polymer-dispersed liquid crystal display

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