Volume holographic recording in photopolymerizable nanocomposite materials based on radical-mediated thiol-yne step-growth polymerizations

Ken Mitsube; Yuki Nishimura; Shingo Takayama; Kohta Nagaya; Yasuo Tomita

doi:10.1117/12.2017477

3 May 2013 Volume holographic recording in photopolymerizable nanocomposite materials based on radical-mediated thiol-yne step-growth polymerizations

Ken Mitsube, Yuki Nishimura, Shingo Takayama, Kohta Nagaya, Yasuo Tomita

Author Affiliations +

Proceedings Volume 8776, Holography: Advances and Modern Trends III; 87760I (2013) https://doi.org/10.1117/12.2017477
Event: SPIE Optics + Optoelectronics, 2013, Prague, Czech Republic

Abstract

We propose the use of radical-mediated thiol-yne step-growth photopolymerizations for volume holographic recording in NPC films to overcome the drawback of low crosslinking densities but retain the advantage of low shrinkage in the thiol-ene photopolymerizations. The thiol-yne photopolymerization mechanism is different from the thiol-ene photopolymeriztions in the sense that each alkyne functional group can react consecutively with two thiol functional groups. We show that thiol-yne based NPC films dispersed with silica nanoparticles give the saturated refractive index change as large as 0.008 and the material recording sensitivity as high as 2005 cm/J at a wavelength of 532 nm, larger than the minimum acceptable values of 0.005 and 500 cm/J, respectively, for holographic data storage. We also show that the shrinkage of a recorded hologram can be as low as that of thiol-ene based NPC films and that the thermal stability is improved better. In addition, we demonstrate digital data page recording in thiol-yne based NPC films, showing a low symbol error rate and a high signal-to-noise ratio to be 2.8×10⁻⁴ and 8, respectively.

Citation Download Citation

Ken Mitsube, Yuki Nishimura, Shingo Takayama, Kohta Nagaya, and Yasuo Tomita "Volume holographic recording in photopolymerizable nanocomposite materials based on radical-mediated thiol-yne step-growth polymerizations", Proc. SPIE 8776, Holography: Advances and Modern Trends III, 87760I (3 May 2013); https://doi.org/10.1117/12.2017477

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