Biphotonic effect-induced phase transition in dye-doped cholesteric liquid crystals and their applications

San Yi Huang, Yi Shin Chen, Hung Chang Jau, Ming Shian Li, Jui Hsiang Liu, Po Chih Yang, Andy Ying Guey Fuh

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

This work studies the biphotonic effect in samples that are cholesteric liquid crystals (CLCs) doped with azo-C5. The experimental results show that the photo-isomerization of azo-C5 not only changes the clearing point of the sample, but also shifts the reflection band that is associated with the planar texture. Additionally, azo dye-doped CLCs (DDCLCs) have bi-stable or tri-stable states, as determined by the ambient temperature. Photo-switching between these bi-stable/tri-stable states is systematically studied. The result indicates that photo-addressing one of these states (planar, focal conic, and isotropic states) using a low- or high-intensity Ar+ laser beam is feasible. The results thus obtained are used to fabricate a photo-rewritable DDCLC display.

Original languageEnglish
Pages (from-to)1726-1731
Number of pages6
JournalOptics Communications
Volume283
Issue number9
DOIs
Publication statusPublished - 2010 May 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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