Nanocomposite polymeric materials for high density optical storage

摘要

We report the results of an extended investigation performed on composite polymeric materialswith the aim of obtaining compounds suitable for holographic recording. In order to investigatethe material properties a characterization of holographic reflection gratings at different writingwavelength (514.5, 457 and 405 nm) has been performed. The volume grating presents highdiffraction efficiency (>60%), high sensitivity (>103 cm J-1) and refractive index modulationAn 0.01 even for writing wavelength in the blue range. We show that following a strategy oftwo basic components leading to phase separation during the photopolymerization process,most of the requirements for holographic data storage are achieved. The one that needs furtherimprovement concerns long term mechanical stability.