报告题目：Photopolymers: characterization and applications
N *1 _?Ckq 报告地点：瞬态室3楼会议室
t&pGQ [0op)Kn 报告时间：9月29日，上午10：00
a>(~ C'(< QRagz, c 报告人：Dr. Sergi Gallego
\>; %Ji tj#b_ u z Department of Physics, Systems Engineering and Signal Theory, University of Alicante, Spain.
a|z 1 K Cg*kN"8q E-mail:
sergi.gallego@ua.es W+/2c4$F3 VwC4QK,d; Abstract：Photopolymer materials enable modulation of the material’s permittivity and thickness, they are self processing, layers with a wide range of thicknesses and properties can be fabricated, they present low scattering and are reasonably cheap. Altogether makes photopolymers a versatile and advantageous material to fabricate diffractive optical elements (DOE) and to store holograms. The material response depends on many parameters. Thus, in order to design a particular photopolymer formulation we have to give priority some of the characteristics over the others. In this work we present the way to characterize and model different types of photopolymers for different applications. Firstly we present the deeply studied formulation based on polyvinyl alcohol acrylamide (PVA/AA). Then we have patented a new environmental composition called biophotopol, where holograms can be recorded with high quality. On the other hand in the classical compositions can be added dispersed liquid crystal molecules to obtain a photopolymers with tunable properties (H-PDLC) and finally we show as this method can be partially applied for the photopolymer commercialized by Bayer-Material Science. As a result, we can obtain the parameters obtained in diffusion models to predict the material behavior for different applications such as holographic data storage.
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43F^J%G Short Biography of Dr. Sergi Gallego U 5clQiow dL(4 mR8 Sergi Gallego graduated in physics, in 2001, from the University of Valencia, Valencia, Spain, and received the Ph.D. degree (with honors) from the University of Alicante, Alicante, Spain, in 2005. He is now an associate professor at University of Alicante. His research is focused on holography, holographic recording materials (photopolymers, photorefractive materials, and holographic polymer dispersed liquid crystals –HPDLC), LCDs for holographic applications, electromagnetic theory, holographic and diffractive optical elements, and holographic data storage. He is a Member of the Spanish Optical Society (SEDOPTICA), Royal Spanish Society of Physics (RSEF), European Optical Society (EOS), and the international society for optics and photonics (SPIE).
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