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Journal of the Optical Society of Korea

Journal of the Optical Society of Korea

| PUBLISHED BY THE OPTICAL SOCIETY OF KOREA

  • Vol. 10, Iss. 1 — Mar. 25, 2006
  • pp: 1–10

Analysis of Optical Properties with Photopolymers for Holographic Application

Nam Kim, Eun-Seop Hwang, and Chang-Won Shin  »View Author Affiliations


Journal of the Optical Society of Korea, Vol. 10, Issue 1, pp. 1-10 (2006)


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Abstract

Optical transparency and high diffraction efficiency are two essential factors for high performance of the photopolymer. Optical transparency mainly depends on the miscibility between polymer binder and photopolymerized polymer, while diffraction efficiency depends on the refractive index modulation between polymer binder and photopolymerized polymer. For most of organic materials, the large refractive index difference between two polymers accompanies large structural difference that leads to the poor miscibility and thus poor optical quality via light scattering. Therefore, it is difficult to design a high-performance photopolymer satisfying both requirements. In this work, first, we prepared a new phase-stable photopolymer (PMMA) with large refractive index modulation and investigated the optical properties. Our photopolymer is based on modified poly (methyl methacrylate) as a polymer binder, acryl amide as a photopolymerizable monomer, triethanolamine as initiator, and yellow eosin as a photosensitizer at 532 nm. Diffraction efficiency over 85% and optical transmittance over 90% were obtained for the photopolymer. Second, Organic-inorganic nanocomposite films were prepared by dispersing an aromatic methacrylic monomer and a photo- initiator in organic-inorganic hybrid sol-gel matrices. The film properties could be controlled by optimizing the content of an organically modified silica precursor (TSPEG) in the sol-gel matrices. The photopolymer film modified with the organic chain (TSPEG) showed high diffraction efficiency (> 90%) under an optimized condition. High diffraction efficiency could be ascribed to the fast diffusion and efficient polymerization of monomers under interference light to generate refractive index modulation. The TSPEG modified photopolymer film could be successfully used for holographic memory.

© 2006 Optical Society of Korea

OCIS Codes
(090.2890) Holography : Holographic optical elements
(090.2900) Holography : Optical storage materials
(090.7330) Holography : Volume gratings

History
Original Manuscript: February 16, 2006
Revised Manuscript: March 13, 2006
Published: March 1, 2006

Citation
Nam Kim, Eun-Seop Hwang, and Chang-Won Shin, "Analysis of Optical Properties with Photopolymers for Holographic Application," J. Opt. Soc. Korea 10, 1-10 (2006)
http://www.opticsinfobase.org/josk/abstract.cfm?URI=josk-10-1-1


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