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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 1, Iss. 8 — Dec. 1, 2011
  • pp: 1494–1501

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

Chandroth P. Jisha, Kuei-Chu Hsu, YuanYao Lin, Ja-Hon Lin, Kai-Ping Chuang, Chao-Yi Tai, and Ray-Kuang Lee  »View Author Affiliations


Optical Materials Express, Vol. 1, Issue 8, pp. 1494-1501 (2011)
http://dx.doi.org/10.1364/OME.1.001494


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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.

© 2011 OSA

OCIS Codes
(140.3390) Lasers and laser optics : Laser materials processing
(160.3710) Materials : Liquid crystals
(190.4420) Nonlinear optics : Nonlinear optics, transverse effects in
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Liquid Crystals

History
Original Manuscript: September 15, 2011
Revised Manuscript: October 9, 2011
Manuscript Accepted: October 10, 2011
Published: November 4, 2011

Virtual Issues
Liquid Crystal Materials for Photonic Applications (2011) Optical Materials Express

Citation
Chandroth P. Jisha, Kuei-Chu Hsu, YuanYao Lin, Ja-Hon Lin, Kai-Ping Chuang, Chao-Yi Tai, and Ray-Kuang Lee, "Phase separation and pattern instability of laser-induced polymerization in liquid-crystal-monomer mixtures," Opt. Mater. Express 1, 1494-1501 (2011)
http://www.opticsinfobase.org/ome/abstract.cfm?URI=ome-1-8-1494


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