Publications [#280435] of David J. Brady
- Chen, AG; Brady, DJ, Real-time holography in azo-dye-doped liquid crystals,
Optics Letters, vol. 17 no. 6
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;