Trithiocarbonate-mediated free-radical photopolymerization: improved uniformity in hologram recording.
A holographic material based on a photopolymerizable nematic acrylate was improved by the addition of the trithiocarbonate, EtO2CCH2SC(S)SCH2CO2Et, increasing uniformity and reproducibility in the formation of electrically switchable holographic gratings. Diffraction efficiencies as high as 34%, the thin-grating theoretical maximum, were achieved at large (10-14 microm) grating spacings. Improved diffraction efficiency was seen over a range of grating spacings (0.35-10 microm). The exposure window for grating formation was increased by an order of magnitude, resulting in much improved reproducibility.
Tucker
Lucas J
LJ
Department of Chemistry, Syracuse University, NY 13244, USA.
Sponsler
Michael B
MB