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Published on: January 14, 2020
Multifunctional photoreactive inorganic cages for three-dimensional holographic data storage
Seungwoo Lee1, Yong-Cheol Jeong, Jihye Lee
1Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Scienceand Technology (KAIST), 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Korea.
Optics Letters
|October 20, 2009
Summary
This study introduces a novel holographic photopolymer using polyhedral oligomeric silsesquioxane (POSS). POSS enhances photosensitivity and refractive index modulation while suppressing shrinkage in holographic gratings.
Area of Science:
- Materials Science
- Polymer Chemistry
- Optics
Background:
- Holographic photopolymers are crucial for optical data storage and display technologies.
- Volume shrinkage during polymerization is a significant challenge, affecting grating fidelity.
- Polyhedral oligomeric silsesquioxane (POSS) offers unique inorganic cage structures with potential for material enhancement.
Purpose of the Study:
- To develop a new holographic photopolymer utilizing POSS.
- To investigate the effect of POSS as a co-monomer on photosensitivity and refractive index modulation.
- To evaluate the ability of POSS to mitigate volume shrinkage in photopolymer resins.
Main Methods:
- Synthesis of a holographic photopolymer incorporating POSS.
- Fabrication of holographic gratings using the developed photopolymer.
- Characterization of photosensitivity, refractive index modulation (Deltan), and volume shrinkage.
Main Results:
- The addition of POSS significantly enhanced photosensitivity.
- POSS incorporation led to a notable increase in refractive index modulation (Deltan).
- Polymerization of POSS effectively suppressed volume shrinkage due to its inorganic cage structure and interpenetrating network formation.
Conclusions:
- Multifunctional photoreactive POSS is a promising component for advanced holographic photopolymers.
- POSS improves key performance metrics of holographic materials, including sensitivity and shrinkage suppression.
- This work paves the way for more robust and high-performance holographic applications.
