Preparation of Langmuir-Blodgett Films of Methacrylate Copolymer Bearing Azo-dye Chromophores and Their Nonlinear Optical Properties.

Abstract

A methacrylate copolymer, poly(MO), was prepared from radical copolymerization of octadecyl methacrylate and methacrylamide bearing DR-1 type azo-dye chromophore as NLO active group, which was synthesized through 7 reaction steps. Poly(MO) gave LB film on quartz substrate by the vertical dipping method. Transfer of the monolayer at the water-air interface was easier in upstroke than in down stroke. By SHG measurement for the multilayers it was found that only in the first monolayer exists an effective noncentrosymmetric structure of NLO chromophores, showing SHG. Unexpectedly, when a heat treatment was performed SH intensity of the monolayer decreased, whereas that of the multilayers increased significantly. More detailed investigations about this heat response behavior were carried out.

The Photopolymer Science and Technology Award

“…Molecular design and synthesis of organic materials having a second order non-linear optical activity [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] Dr.Kato joined the faculty at Tokyo University of Science in 1989 as Professor and directed a number of students in two aspects of research in the molecular design and synthesis of non-linear optical oligomer and polymer. Professor Kato devoted himself to a study of a design and synthesis of novel polymers having non-linear optical (NLO) activity, which are able to use as a wavelength conversion, modulator and a switching element.…”