The multifunctional azopolymers (PAZ-R +*) containing azobenzene moieties with chiral group were synthesized as a new class of optical polymers.The structure of polymers was characterized by GPC, elemental analysis an...The multifunctional azopolymers (PAZ-R +*) containing azobenzene moieties with chiral group were synthesized as a new class of optical polymers.The structure of polymers was characterized by GPC, elemental analysis and circular dichroism.The optical phase conjugated responses of the polymer films were investigated by the degenerate four-wave mixing (DFWM).Furthermore, the photo-induced holographic phase gratings of the films were characterized by POM.The experimental results showed that optically active polymers(PAZ-R +*) containing chiral groups could form holographic phase gratings buried in the films.From the preliminary measurements of photoalignment, it was found that the chiral group in side-chain azobenzene polymer films could play an important role in responding polarization direction of the irradiating beams and the irradiating number.The chiral group was found to have influence on changing physical properties such as optical phase conjugated characteristics effectively and on the formation of microstructures in the film.Further studies on the photoinduced properties of side-chain azobenzene polymer films with chiral groups are in progress.展开更多
The mechanisms of photoinduced microstructures in an azobenzene polymer film are presented.They are based on the spatial periodic modulation of optical intensity and the photoisomerization of azobenzene molecules with...The mechanisms of photoinduced microstructures in an azobenzene polymer film are presented.They are based on the spatial periodic modulation of optical intensity and the photoisomerization of azobenzene molecules with the movement of main chains.Experiment and theory jointly point out the possibility of photoinducing desired spatial microstructures in azobenzene organic polymer via adequate optical lattices and adequately polarized‘writing’beams.展开更多
Pattern formation in azobenzene polymer film by degenerate four-wave mixing is reported.Island arrays with specific patterns are analyzed with scanning electron microscopy and polarizing optical microscopy.It is demon...Pattern formation in azobenzene polymer film by degenerate four-wave mixing is reported.Island arrays with specific patterns are analyzed with scanning electron microscopy and polarizing optical microscopy.It is demonstrated that the control of photo-induced nanostructure sized micropattern in the nonlinear organic film is possible by using properly polarized writing beams with the total incident power exceeding a certain threshold.展开更多
文摘The multifunctional azopolymers (PAZ-R +*) containing azobenzene moieties with chiral group were synthesized as a new class of optical polymers.The structure of polymers was characterized by GPC, elemental analysis and circular dichroism.The optical phase conjugated responses of the polymer films were investigated by the degenerate four-wave mixing (DFWM).Furthermore, the photo-induced holographic phase gratings of the films were characterized by POM.The experimental results showed that optically active polymers(PAZ-R +*) containing chiral groups could form holographic phase gratings buried in the films.From the preliminary measurements of photoalignment, it was found that the chiral group in side-chain azobenzene polymer films could play an important role in responding polarization direction of the irradiating beams and the irradiating number.The chiral group was found to have influence on changing physical properties such as optical phase conjugated characteristics effectively and on the formation of microstructures in the film.Further studies on the photoinduced properties of side-chain azobenzene polymer films with chiral groups are in progress.
基金Supported by the National Natural Science Foundation of China under Grant No.19604015Natural Science Foundation of Guangdong Province under Grant No.980279.
文摘The mechanisms of photoinduced microstructures in an azobenzene polymer film are presented.They are based on the spatial periodic modulation of optical intensity and the photoisomerization of azobenzene molecules with the movement of main chains.Experiment and theory jointly point out the possibility of photoinducing desired spatial microstructures in azobenzene organic polymer via adequate optical lattices and adequately polarized‘writing’beams.
基金Supported by the National Natural Science Foundation of China under Grant No.19604015.
文摘Pattern formation in azobenzene polymer film by degenerate four-wave mixing is reported.Island arrays with specific patterns are analyzed with scanning electron microscopy and polarizing optical microscopy.It is demonstrated that the control of photo-induced nanostructure sized micropattern in the nonlinear organic film is possible by using properly polarized writing beams with the total incident power exceeding a certain threshold.
