WRITING AND ERASURE OF HOLOGRAPHIC GRATINGS IN DYE-DOPED POLYMER-DISPERSED LIQUID-CRYSTALS

Authors
CIPPARRONE G MAZZULLA A SIMONI F
Citation
G. Cipparrone et al., WRITING AND ERASURE OF HOLOGRAPHIC GRATINGS IN DYE-DOPED POLYMER-DISPERSED LIQUID-CRYSTALS, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 299, 1997, pp. 329
Citations number
11
Categorie Soggetti
Crystallography
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
299
Year of publication
1997
Database
ISI
SICI code
1058-725X(1997)299:<329:WAEOHG>2.0.ZU;2-1
Abstract
We Demonstrate that is possible to write and erase holographic grating s in dye-doped polymer dispersed liquid crystals (PDLC). PDLC samples were irradiated after complete curing using two beams in an interferom etric geometry. In this way permanent holographic gratings were Mitten with a resolution up to 100 lines/mm. The erasure was obtained by a s ingle beam, while successive writing were possible again by two beams interference, without any degradation after many cycles. The origin of the effect can be the onset of periodic distribution of droplets of d ifferent shape and spatial diffusion of the dye molecules.