Particular thermally induced phase separation of liquid crystal and poly(N-vinyl carbazole) films and its application

被引：14

作者：

Chen, Yuan-Di ^{[1
]}

Fuh, Andy Ying-Guey ^{[1
,2
,3
]}

Cheng, Ko-Ting ^{[2
,3
]}

机构：

[1] Natl Cheng Kung Univ, Dept Photon, Tainan 701, Taiwan

[2] Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan

[3] Natl Cheng Kung Univ, Adv Optoelect Technol Ctr, Tainan 701, Taiwan

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 15期

关键词：

LIGHT-SCATTERING; POLYMER; MICROSTRUCTURE; HAZE;

D O I：

10.1364/OE.20.016777

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In the current study, a method of particular thermally induced phase separation (TIPS) of liquid crystals (LCs) and polymers is presented. The method involves a combination of dissolution process and TIPS. The LCs and poly(N-vinyl carbazole) (PVK) play the roles of solvent and solute, respectively, during the processes of particular TIPS. The nematic LC sample fabricated by two substrates coated with uniform PVK films is heated and then cooled, generating the rough PVK layers onto the surfaces of the substrates. The LC sample having rough PVK layers produces micron-sized, multiple domains of disordered LCs that can scatter incident light. Additionally, an application of a scattering mode light shutter, having the advantages of low driving voltage, polarization-independent scattering, fast response, high contrast ratio, and being polarizer free, is reported. (C) 2012 Optical Society of America

引用

页码：16777 / 16784

页数：8

共 25 条

[1] FROM LIGHT-SCATTERING TO THE MICROSTRUCTURE OF THIN-FILM MULTILAYERS [J].

AMRA, C .

APPLIED OPTICS, 1993, 32 (28) :5481-5491

[2] Smart Bistable Polymer Stabilized Cholesteric Texture Light Shutter [J].

Bao, Rui ;

Liu, Cheng-Mei ;

Yang, Deng-Ke .

APPLIED PHYSICS EXPRESS, 2009, 2 (11)

[3] Radial liquid crystal alignment based on circular rubbing of a substrate coated with poly(N-vinyl carbazole) film [J].

Chen, Yuan-Di ;

Fuh, Andy Ying-Guey ;

Liu, Cheng-Kai ;

Cheng, Ko-Ting .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2011, 44 (21)

[4] Polarization rotators fabricated by thermally-switched liquid crystal alignments based on rubbed poly(N-vinyl carbazole) films [J].

Chen, Yuan-Di ;

Cheng, Ko-Ting ;

Liu, Cheng-Kai ;

Fuh, Andy Ying-Guey .

OPTICS EXPRESS, 2011, 19 (08) :7553-7558

[5] Electrically switchable and optically rewritable reflective Fresnel zone plate in dye-doped cholesteric liquid crystals [J].

Cheng, Ko-Ting ;

Liu, Cheng-Kai ;

Ting, Chi-Lun ;

Fuh, Andy Ying-Guey .

OPTICS EXPRESS, 2007, 15 (21) :14078-14085

[6] Two-stage switching behavior of polymer stabilized cholesteric textures [J].

Dierking, I ;

Kosbar, LL ;

AfzaliArdakani, A ;

Lowe, AC ;

Held, GA .

JOURNAL OF APPLIED PHYSICS, 1997, 81 (07) :3007-3014

[7] FIELD CONTROLLED LIGHT-SCATTERING FROM NEMATIC MICRODROPLETS [J].

DOANE, JW ;

VAZ, NA ;

WU, BG ;

ZUMER, S .

APPLIED PHYSICS LETTERS, 1986, 48 (04) :269-271

[8] RELATION BETWEEN LIGHT-SCATTERING AND THE MICROSTRUCTURE OF OPTICAL THIN-FILMS [J].

DUPARRE, A ;

KASSAM, S .

APPLIED OPTICS, 1993, 32 (28) :5475-5480

[9] POLYMER DISPERSED NEMATIC LIQUID-CRYSTAL FILMS - THE DENSITY RATIO AND POLYMERS CURING RATE EFFECTS [J].

FUH, A ;

CAPORALETTI, O .

JOURNAL OF APPLIED PHYSICS, 1989, 66 (11) :5278-5284

[10] Polarizer-free, electrically switchable and optically rewritable displays based on dye-doped polymer-dispersed liquid crystals [J].

Fuh, Andy Ying-Guey ;

Chen, Che-Chang ;

Liu, Cheng-Kai ;

Cheng, Ko-Ting .

OPTICS EXPRESS, 2009, 17 (09) :7088-7094

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