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

doi:10.1364/OME.1.001494

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

Department of Optics and Photonics

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

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 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.

Original language	English
Pages (from-to)	1494-1501
Number of pages	8
Journal	Optical Materials Express
Volume	1
Issue number	8
DOIs	https://doi.org/10.1364/OME.1.001494
State	Published - 1 Dec 2011

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title = "Phase separation and pattern instability of laser-induced polymerization in liquid-crystal-monomer mixtures",

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 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.",

author = "Jisha, {Chandroth P.} and Hsu, {Kuei Chu} and Lin, {Yuan Yao} and Lin, {Ja Hon} and Chuang, {Kai Ping} and Tai, {Chao Yi} and Lee, {Ray Kuang}",

note = "Funding Information: This work is partly supported by the National Science Council of Taiwan, under the Contract numbers NSC 98-2218-E-008-004 and NSC 100-2811-M-007-044. The authors thank Yao-De Jhong for his help plotting the figures.",

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AU - Jisha, Chandroth P.

AU - Hsu, Kuei Chu

AU - Lin, Yuan Yao

AU - Lin, Ja Hon

AU - Chuang, Kai Ping

AU - Tai, Chao Yi

AU - Lee, Ray Kuang

N1 - Funding Information: This work is partly supported by the National Science Council of Taiwan, under the Contract numbers NSC 98-2218-E-008-004 and NSC 100-2811-M-007-044. The authors thank Yao-De Jhong for his help plotting the figures.

PY - 2011/12/1

Y1 - 2011/12/1

N2 - 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.

AB - 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.

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JO - Optical Materials Express

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

Abstract

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