Optical addressing in dye-doped cholesteric liquid crystals

Ko Ting Cheng, Cheng Kai Liu, Chi Lun Ting, Andy Ying Guey Fuh

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


This study investigates a method of optical addressing in dye-doped cholesteric liquid crystals (DDCLCs). Photo-induced randomly adsorbed dyes can change the CLC textures from planar to focal conic. Such patterning can be adopted to develop a display that is initially invisible, but becomes visible upon heating above the clearing temperature, followed by cooling to room temperature. The display can also become visible upon the application of a suitable voltage, and its rapid release. Additionally, the display is thermally erasable, optically rewritable and electrically switchable. It can be applied for use as a smart card.

Original languageEnglish
Pages (from-to)5133-5139
Number of pages7
JournalOptics Communications
Issue number20
StatePublished - 15 Oct 2008


  • Adsorption
  • Azo dye
  • Cholesteric
  • Liquid crystals


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