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

Chandroth P. Jisha, Kuei Chu Hsu, Yuan Yao Lin, Ja Hon Lin, Kai Ping Chuang, Chao Yi Tai, Ray Kuang Lee

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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.

Original languageEnglish
Title of host publication2012 Conference on Lasers and Electro-Optics, CLEO 2012
StatePublished - 2012
Event2012 Conference on Lasers and Electro-Optics, CLEO 2012 - San Jose, CA, United States
Duration: 6 May 201211 May 2012

Publication series

Name2012 Conference on Lasers and Electro-Optics, CLEO 2012

Conference

Conference2012 Conference on Lasers and Electro-Optics, CLEO 2012
Country/TerritoryUnited States
CitySan Jose, CA
Period6/05/1211/05/12

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