Abstract
There is considerable interest in understanding the origin of the molecular nonlinear polarizabilities. Recently, the important role of bond alternation (difference in the carbon-carbon double bond and single bond lengths) in influencing the second order polarizability, β, of asymmetric conjugated dyes has been pointed out.[1] It was suggested that there is an optimal degree of alternation needed to maximize β. The connection between bond-alternation and the electronic, optical and chemical properties of conjugated molecules has also been recognized previously.[2] These studies as well as the results of prior experimental studies[3] have led us to investigate the affect of bond alternation on the third-order polarizability, γ. One aim of the present work is to gain insight into the differences between the magnitude and signs of γ for simple polyenes and cyanines. For moderate length to long polyenes, nonresonant electronic γ is positive, whereas for comparable cyanines γ is negative.
© 1992 Optical Society of America
PDF ArticleMore Like This
Grant Bourhill, Jean-Luc Brédas, Lap-Tak Cheng, Andrienne C. Friedli, Christopher B. Gorman, Seth R. Marder, Fabienne Meyers, Joseph W. Perry, Brian M. Pierce, Jørgen Skindhøj, and Bruce G. Tiemann
WC.1 Organic Thin Films for Photonic Applications (OTF) 1993
Isabelle Ledoux, Germain Puccetti, Joseph Zyss, Mireile Blanchard-Desce, and Jean-Marie Lehn
QTuE3 Quantum Electronics and Laser Science Conference (CLEO:FS) 1993
Fabienne Meyers, Chin-Ti Chen, David Beljonne, Jean-Luc Brédas, and Seth R. Marder
MC.3 Organic Thin Films for Photonic Applications (OTF) 1995