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

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Title:	Polar orientation induced by local photo-assisted poling in azo copolymer films
Authors:	Chien, F.S.-S., Lin, C.Y., Huang, C.R., Chang, C.S., Hsu, C.C.
Contributors:	Department of Physics, Tunghai University
Keywords:	Biexponential functions;Characteristic time;Copolymer films;Disperse red 1;Electrostatic force microscopy;Hole burning;Polar orientation
Date:	2010
Issue Date:	2013-05-21T09:15:16Z (UTC)
Abstract:	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 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. ? 2010 Optical Society of America.
Relation:	Journal of the Optical Society of America B: Optical Physics 27 (4) , pp. 773-778
Appears in Collections:	[Department of Applied Physics] Periodical Articles

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