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Publications [#280435] of David J. Brady

Papers Published

  1. Chen, AG; Brady, DJ, Real-time holography in azo-dye-doped liquid crystals, Optics Letters, vol. 17 no. 6 (March, 1992), pp. 441-443, The Optical Society [doi]
    (last updated on 2019/11/11)

    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. © 1992 Optical Society of America.

    holography;nematic liquid crystals;optical materials;organic compounds;