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Proceedings Paper

Volume holographic recording in photopolymerizable nanocomposite materials based on radical-mediated thiol-yne step-growth polymerizations
Author(s): Ken Mitsube; Yuki Nishimura; Shingo Takayama; Kohta Nagaya; Yasuo Tomita
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Paper 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.

Paper Details

Date Published: 3 May 2013
PDF: 12 pages
Proc. SPIE 8776, Holography: Advances and Modern Trends III, 87760I (3 May 2013); doi: 10.1117/12.2017477
Show Author Affiliations
Ken Mitsube, The Univ. of Electro-Communications (Japan)
Yuki Nishimura, The Univ. of Electro-Communications (Japan)
Shingo Takayama, The Univ. of Electro-Communications (Japan)
Kohta Nagaya, The Univ. of Electro-Communications (Japan)
Yasuo Tomita, The Univ. of Electro-Communications (Japan)

Published in SPIE Proceedings Vol. 8776:
Holography: Advances and Modern Trends III
Miroslav Hrabovský; John T. Sheridan; Antonio Fimia-Gil, Editor(s)

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