Real-time holography in azo-dye-doped liquid crystals

Alan G. Chen, David J. Brady

Research output: Contribution to journalArticlepeer-review

153 Scopus citations


When exposed to an Ar laser at 514 nm, azo-dye molecules in a nematic liquid-crystal host undergo photoisomerization from trans-isomers to cis-isomers. The conformation change of the azo-dye molecules reorients liquid-crystal molecules. Reversible polarization holograms can be recorded dynamically by this effect, with a threshold intensity as low as 3.0 mW/cm2 and a response time from a few hundred microseconds to 100 ms, depending on the spatial frequency of the recorded grating.

Original languageEnglish (US)
Pages (from-to)441-443
Number of pages3
JournalOptics letters
Issue number6
StatePublished - Mar 15 1992
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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