The orientation relaxation of azo-dyes upon all-optical poling was studied. Azo-dye doped amorphous polymers were poled for different durations by all-optical poling at several temperatures. A quasi-permanent macroscopic second-order nonlinear optical susceptibility chi((2)) was inscribed in the dye-doped centrosymmetric polymer systems. Relaxation of the chi((2)) was monitored by second harmonic generation. It shows that the polar orientation relaxation follows the duration of the poling process: the longer the poling, the slower the polar relaxation time. Causes of the orientation relaxation retardation are discussed. (c) 2006 Elsevier B.V. All rights reserved.

Chan, S.w., Nunzi, J.m., Quatela, A., Casalboni, M. (2006). Retardation of orientation relaxation of azo-dye doped amorphous polymers upon all-optical poling. CHEMICAL PHYSICS LETTERS, 428, 371-375 [10.1016/j.cplett.2006.07.028].

Retardation of orientation relaxation of azo-dye doped amorphous polymers upon all-optical poling

CASALBONI, MAURO
2006-01-01

Abstract

The orientation relaxation of azo-dyes upon all-optical poling was studied. Azo-dye doped amorphous polymers were poled for different durations by all-optical poling at several temperatures. A quasi-permanent macroscopic second-order nonlinear optical susceptibility chi((2)) was inscribed in the dye-doped centrosymmetric polymer systems. Relaxation of the chi((2)) was monitored by second harmonic generation. It shows that the polar orientation relaxation follows the duration of the poling process: the longer the poling, the slower the polar relaxation time. Causes of the orientation relaxation retardation are discussed. (c) 2006 Elsevier B.V. All rights reserved.
2006
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/03 - FISICA DELLA MATERIA
English
Amorphous materials; Doping (additives); Molecular orientation; Nonlinear optics; Relaxation processes; Second harmonic generation; Amorphous polymers; Nonlinear optical susceptibility; Optical poling; Orientation relaxation; Azo dyes
Chan, S.w., Nunzi, J.m., Quatela, A., Casalboni, M. (2006). Retardation of orientation relaxation of azo-dye doped amorphous polymers upon all-optical poling. CHEMICAL PHYSICS LETTERS, 428, 371-375 [10.1016/j.cplett.2006.07.028].
Chan, Sw; Nunzi, Jm; Quatela, A; Casalboni, M
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/55279
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