Synthesis and characterization of azobenzene / silica composites for optical applications

• Main Authors: Chia-Hung Chen, 陳嘉鴻
• Other Authors: Wei-Hung Su
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/99276047274338074930

碩士 === 國立中山大學 === 材料與光電科學學系研究所 === 101 === In this study, the optical strong materials were prepared by sol-gel process. A method employs 3 - aminopropyl triethoxysilane (APTES) and 2 - {[4 - (dimethylamino) phenyl] azo} benzoic acid (Methyl Red) as the precursors. The ionic interaction reduce the phase separation between the inorganic silicon substrate and the organic azobenzene. The characteristics of the ion interaction compose a unique chemical, increasing the thermal stability and long term preservation. In this study, diffraction efficiencies using various laser wavelengths, such as 532 nm、 450 nm and 406 nm, have been thoroughly studied. It is found that the recording wavelength of 532 nm provided a better performance, since the diffraction efficiency was higher than the other s. On the other hand, the recording wavelength of 450 nm did not generate high order diffractions. This makes it desirable to reconstruct the object wave with low distortion and low noises.