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23 April 2019 Hyperbranched-polymer nanocomposite gratings with ultrahigh refractive index modulation amplitudes for volume holographic optical elements
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Abstract
We report on an experimental investigation of recording a plane-wave volume holographic transmission grating in a photopolymerizable nanoparticle-polymer composite film dispersed with hyperbranched-polymer (HBP) organic nanoparticles in an acrylate monomer blend codoped with an electron donor and acceptor photoinitiator/inhibitor system. The HBP organic nanoparticle possesses the ultrahigh refractive index of 1.82 at 532 nm owing to the inclusion of triazine and aromatic ring units, which provides a large difference in the refractive index between HBP and the formed polymer. It is found that the recorded NPC grating with 23 vol.% HBP dispersion possesses the saturated refractive index modulation amplitude as large as 4.5 x 10-2 at 532 nm and at recording intensities of a few mW/cm2. Obtained results suggest the use of our newly developed HBP-dispersed NPC as volume optical holographic elements for wearable display for augmented and mixed reality.
Conference Presentation
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yasuo Tomita, Toshi Aoi, Juro Oshima, and Keisuke Odoi "Hyperbranched-polymer nanocomposite gratings with ultrahigh refractive index modulation amplitudes for volume holographic optical elements", Proc. SPIE 11030, Holography: Advances and Modern Trends VI, 1103007 (23 April 2019); https://doi.org/10.1117/12.2520512
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