Singlet oxygen mediated non-diffusive photopolymers for hologram recording materials
발표자
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초록
내용
Usually photopolymers for 3D holographic recording materials were used refractive index changing by laser induced polymerization of photo-reactive monomers that leads to the diffusion of an initial homogeneous mixture of component. In this study, we present a non-diffusion process using porphyrin sensitized singlet oxygen. When porphyrin absorbs light, oxygen molecules become highly reactive singlet state oxygen via energy transfer mechanism. From the high reactivity of singlet state oxygen, it changes the structure of surrounding chemical and thereby causes a change in the refractive index. This refractive index change makes it possible to record holograms. In this study, we synthesized the acrylated porphyrin that generates singlet oxygen at 600nm wavelength and characterized the patterning properties by singlet oxygen through NMR, PL and UV-vis spectroscopy.