Photoinduced Holographic Phase Gratings Buried in Azobenzene Side-Chain Polymer Films with A Chiral Group
writer：L.LI, H.C.Dong, Y. Zhang, Z.D. Xu, X.H.Fan**, X.F.
keywords：Holographic phase gratings,Azobenzene polymer,Chiral groups
source：期刊
An optically active polymer(PM1) containg zaobenzene moieties with a chiral group (s-2-methyl-butyl) was synthesized by homopolymerization of monomer,4-[2-(methacryloyloxy)ethyloxy]-4`-(s-2-methyl-1-butyloxycarbonyl) azobenzene,using the free radical polmerization method. The polymer dissolved in tetrahydrofuran(THF) could be easily proessed into high optical quality films. The optical anisotropy of the polymer films was investigated by polarizing optical microscopy(POM).The experimental results showed that irradiation with a circularly polarize beam could align the orientation of the molecules in polymer films. Moreover, the holographic phase gratings of photo-induced polymer films were detected by atomic force microscopy(AFM) and POM,in comparison with polymer containing no chiral group,it was found from the preliminary measurement of the photo-induced holographic phase gratings that PM1 containing a chiral group could form holographic phase gratings buried in the films.