A holographic material based on a photopolymerizable nematic acrylate was improved by the addition of the trithiocarbonate, EtO2CCH 2SC(S)SCH2CO2Et, increasing uniformity and reproducibility in the formation of electrically switchable holographic gratings. Diffraction efficiencies as high as 34%, the thingrating theoretical maximum, were achieved at large (10-14 μm) grating spacings. Improved diffraction efficiency was seen over a range of grating spacings (0.35-10 μm). The exposure window for grating formation was increased by an order of magnitude, resulting in much improved reproducibility.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Engineering (miscellaneous)
- Electrical and Electronic Engineering