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

Content Provider	IEEE Xplore Digital Library
Author	Jisha, C.P. Kuei-Chu Hsu Yuan Yao Lin Ja-Hon Lin Kai-Ping Chuang Chao-Yi Tai Ray-Kuang Lee
Copyright Year	2012
Description	Author affiliation: Center for Measurement Standards, Industrial Technology Research Institute, Hsinchu 300, Taiwan (Kai-Ping Chuang) \|\| Institute of Photonics Technologies, National Tsing-Hua University, Hsinchu 300, Taiwan (Jisha, C.P.; Yuan Yao Lin; Ray-Kuang Lee) \|\| Unice E-O Services Inc. chungli 320, Taiwan (Kuei-Chu Hsu) \|\| Department of Electro-Optical Engineering and Institute of Electro-Optical Engineering, National Taipei University of Technology, Taipei 106, Taiwan (Ja-Hon Lin) \|\| Department of Optics and Photonics, National Central University, Chung-Li 320, Taiwan (Chao-Yi Tai)
Abstract	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 optical microscope images taken in experiments 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.
Starting Page	1
Ending Page	2
File Size	170249
Page Count	2
File Format	PDF
ISBN	9781467318396
e-ISBN	9781557529343
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-05-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	OSA
Subject Keyword	Biomedical optical imaging Morphology Ultrafast optics Liquid crystals Optical pulses Optical polymers
Content Type	Text
Resource Type	Article

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