Phase separation and pattern instability of laser-induced polymerization in liquid-crystal-monomer mixtures

被引：10

作者：

Jisha, Chandroth P. ^{[1
,2
]}

Hsu, Kuei-Chu ^{[3
]}

Lin, YuanYao ^{[2
]}

Lin, Ja-Hon ^{[1
,4
,5
]}

Chuang, Kai-Ping ^{[6
]}

Tai, Chao-Yi ^{[7
]}

Lee, Ray-Kuang ^{[1
,2
]}

机构：

[1] Natl Tsing Hua Univ, Inst Photon Technol, Hsinchu 300, Taiwan

[2] Natl Tsing Hua Univ, Frontier Res Ctr Fundamental & Appl Sci Matters, Hsinchu 300, Taiwan

[3] Unice EO Serv Inc, Chungli 320, Taiwan

[4] Natl Taipei Univ Technol, Dept Electroopt Engn, Taipei 106, Taiwan

[5] Natl Taipei Univ Technol, Inst Electroopt Engn, Taipei 106, Taiwan

[6] Ind Technol Res Inst, Ctr Measurement Stand, Hsinchu 300, Taiwan

[7] Natl Cent Univ, Dept Opt & Photon, Chungli 320, Taiwan

来源：

OPTICAL MATERIALS EXPRESS | 2011年 / 1卷 / 08期

关键词：

DIFFUSION; ALIGNMENT;

D O I：

10.1364/OME.1.001494

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Directly written by a ultra-short femto-second laser pulse, we report the phase separation and pattern formation induced by polymerization in a liquid-crystal-monomer mixture. By varying the scanning speed of optical fields along a line, pattern transitions of photon-induced polymer structures are illustrated in shapes of double-humped, single-humped, and broken stripes. The experimental data collected by optical microscopic images are in a good agreement with numerical simulations based on a modified set of coupled 2 + 1 dimensional diffusion equations. The demonstration in this work provides a step for controlling phase separation morphologies as well as transferring patterns in polymer-dispersed liquid crystals. (C) 2011 Optical Society of America

引用

页码：1494 / 1501

页数：8

共 25 条

[1] Diffusion kinetics of formation of holographic polymer-dispersed liquid crystal display materials
Bowley, CC
Crawford, GP
[J]. APPLIED PHYSICS LETTERS, 2000, 76 (16) : 2235 - 2237
[2] Self-assembled, optically responsive nematic liquid crystal/polymer core-shell fibers: Formation and characterization
Buyuktanir, Ebru A.
Frey, Margaret W.
West, John L.
[J]. POLYMER, 2010, 51 (21) : 4823 - 4830
[3] In situ diffusion studies using spatially resolved infrared microspectroscopy
Challa, SR
Wang, SQ
Koenig, JL
[J]. APPLIED SPECTROSCOPY, 1996, 50 (11) : 1339 - 1344
[4] Gennes P. d., 1995, PHYS LIQUID CRYSTALS
[5] Patterned field induced polymer walls for smectic A bistable flexible displays
Gheorghiu, N.
West, J. L.
Glushchenko, A. V.
Mitrokhin, M.
[J]. APPLIED PHYSICS LETTERS, 2006, 88 (26)
[6] Polymer waveguides from alicyclic methacrylate copolymer fabricated by deep-UV exposure
Ichihashi, Yasuhisa
Henzi, Patric
Bruendel, Mathias
Mohr, Juergen
Rabus, Dominik Gerhard
[J]. OPTICS LETTERS, 2007, 32 (04) : 379 - 381
[7] Optical Pattern Transitions from Modulation to Transverse Instabilities in Photorefractive Crystals
Jeng, Chien-Chung
Lin, YuanYao
Hong, Ray-Ching
Lee, Ray-Kuang
[J]. PHYSICAL REVIEW LETTERS, 2009, 102 (15)
[8] Polymer-stabilized liquid crystal blue phases
Kikuchi, H
Yokota, M
Hisakado, Y
Yang, H
Kajiyama, T
[J]. NATURE MATERIALS, 2002, 1 (01) : 64 - 68
[9] Polymer-dispersed liquid crystal devices using highly conducting polymers as electrodes
Kim, Jin-Yeol
Woo, Hak-Yong
Baek, Ji-Woong
Kirn, Tae-Wook
Song, Eun-Ah
Park, Su-Cheol
Ihm, Dae-Woo
[J]. APPLIED PHYSICS LETTERS, 2008, 92 (18)
[10] POLYMERIZATION-INDUCED PHASE-SEPARATION IN A LIQUID-CRYSTAL-POLYMER MIXTURE
KIM, JY
CHO, CH
PALFFYMUHORAY, P
MUSTAFA, M
KYU, T
[J]. PHYSICAL REVIEW LETTERS, 1993, 71 (14) : 2232 - 2235

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