Polar orientation induced by local photo-assisted poling in azo copolymer films

F. S.-S. Chien, C. Y. Lin, C. R. Huang, C. S. Chang, C. C. Hsu
2010 Journal of the Optical Society of America. B, Optical physics  
Polar orientation created by local photo-assisted poling (PAP) in copolymer films containing disperse red 1 was investigated by scanning probe microscopy. PAP was performed by a proximal biased probe, and the polar orientation was semiquantitatively measured by electrostatic force microscopy. The polar orientation behaves as a biexponential function of the period of PAP, which is dominated by fast angular hole burning and slow angular redistribution (AR). The characteristic time of AR decreases
more » ... ime of AR decreases linearly with the poling bias. An expression has been developed to interpret the evolution of the Lorentzian-like shape of the poled spots. A poled spot with 150 nm FWHM was demonstrated.
doi:10.1364/josab.27.000773 fatcat:cxpne3dvkrdvjhxbj5ullu2bv4