Surface relief gratings on polymer dispersed liquid crystals by polarization holography
- Dipartimento di Fisica, Licryl-Liquid Crystals Laboratory and INFM, Universita della Calabria, 87036 Arcavacata di Rende, CS (Italy)
We report the observation of surface relief gratings (SRGs) on polymer dispersed liquid crystal films after polarization holographic recording, demonstrating the formation of SRGs in systems without azo compounds, where photoisomerization and chromophore reorientation processes do not occur. Permanent SRGs, several hundred nanometers deep, are recorded on the surface of a polymeric material containing oriented liquid crystal droplets. The results suggest that SRG growth under uniform intensity irradiation is not exclusively related to the photoisomerization, but is a more general phenomenon which can involve different photoinduced chemical and physical mechanisms sensitive to the light polarization state. These effects contribute to the formation of anisotropic structures during the recording process.
- OSTI ID:
- 20634290
- Journal Information:
- Applied Physics Letters, Vol. 85, Issue 13; Other Information: DOI: 10.1063/1.1793355; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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