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Optical Materials Express

Optical Materials Express

  • Editor: David Hagan
  • Vol. 4, Iss. 5 — May. 1, 2014
  • pp: 982–996

Holographic nanoparticle-polymer composites based on radical-mediated thiol-yne photopolymerizations: characterization and shift-multiplexed holographic digital data page storage

Ken Mitsube, Yuki Nishimura, Kohta Nagaya, Shingo Takayama, and Yasuo Tomita  »View Author Affiliations

Optical Materials Express, Vol. 4, Issue 5, pp. 982-996 (2014)

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We investigate volume holographic recording in a photopolymerizable nanoparticle-polymer (NPC) composite film that employs radical-mediated thiol-yne step-growth photopolymerizations. Because each alkyne functional group can react consecutively with two thiol functional groups in thiol-yne photopolymerizatins, the thiol-yne based NPC system dispersed with inorganic nanoparticles has the potentiality to overcome the drawback of low crosslinking densities but to retain the advantage of low shrinkage that is possible by use of thiol-ene photopolymerizations. We show that a thiol-yne based NPC film dispersed with 25 vol.% SiO2 nanoparticles and 15 wt.% single functional co-monomer gives the saturated refractive index change as large as 0.008 and the material recording sensitivity as high as 2005 cm/J at a recording and readout wavelength of 532 nm. We find that while the shrinkage of a volume hologram recorded in a thiol-yne based NPC dispersed with organic nanopartices can be as low as 0.5%, it is approximately 1% with the dispersion of SiO2 nanoparticles due to the plasticizing effect of the doped co-monomer. On the other hand, the thermal stability is improved better with the dispersion of SiO2 nanoparticles. We also demonstrate shift-multiplexed holographic storage of 80 digital data pages in a thiol-yne based NPC film with high readout fidelity.

© 2014 Optical Society of America

OCIS Codes
(090.2900) Holography : Optical storage materials
(160.5470) Materials : Polymers
(210.2860) Optical data storage : Holographic and volume memories
(210.4810) Optical data storage : Optical storage-recording materials
(160.4236) Materials : Nanomaterials
(160.5335) Materials : Photosensitive materials

ToC Category:
Organics and Polymers

Original Manuscript: December 3, 2013
Revised Manuscript: February 24, 2014
Manuscript Accepted: March 14, 2014
Published: April 15, 2014

Ken Mitsube, Yuki Nishimura, Kohta Nagaya, Shingo Takayama, and Yasuo Tomita, "Holographic nanoparticle-polymer composites based on radical-mediated thiol-yne photopolymerizations: characterization and shift-multiplexed holographic digital data page storage," Opt. Mater. Express 4, 982-996 (2014)

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