학술논문
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Applied Physics A: Materials Science & Processing . 2003, Vol. 77 Issue 3/4, p375. 4p.
Highly efficient, thermally stable and optically transparent third-order nonlinear optical copolymers consisting of fluorene and quinoxaline/quinoline units.
Document Type
Article
Source
Subject
*POLYMERS
*ELECTRONS
*FLUORENE
*QUINOLINE
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Language
ISSN
0947-8396
Abstract
New fluorene-linked conjugated polyquinoxaline and polyquinoline possess adequate optical transparency, excellent thermal stability and good processability. Degenerate four-wave-mixing measurements on these polymers yield nonresonant third-order susceptibilities as high as 1.1 × 10[SUP-10] esu and nonresonant second-order hyperpolarizabilities per repeated unit as high as 2.0 × 10[SUP-31] esu. The large nonlinearity originates from the high electron delocalization due to the planar rigid structure of the fluorene ring and the imine nitrogen of quinoxaline and quinoline. [ABSTRACT FROM AUTHOR]