| 초록 |
The use of photopolymerizable compositions (photopolymer) are promising candidates for high-density holographic data storage system (HDSS), because of many advantages such as their high sensitivity and refractive index contrast. To be useful for HDSS applications, a photopolymer must have low dimensional changes degrading the fidelity and high optical quality in the visible range. In this work, we present a new and efficient organic-inorganic hybrid photopolymer for write once, read many times (WORM) HDSS. The material consists of light-sensitive monomer and polyhedral oligomeric silisesquioxane (POSS) with an average size of 1~3nm. By incorporating the POSS as a cross-linking reagents, polymerization-induced shrinkage can be reduced while maintaining a low level of scattering and a high sensitivity. The influence of the POSS to monomer ratio on the properties such as diffraction efficiency, energetic sensitiivty, and angular response is also investigated and discussed. |
