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Proceedings Paper

Role of combined bridge on the second-order nonlinear optical properties of organic stilbazolium salts
Author(s): Xin Wang; Yiping Cui; Yaochun Shen; Zu-Hong Lu; Fanqing Meng; Xu Dong
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Paper Abstract

The second-order nonlinear optical (NLO) properties of three new organic stilbazolium salts (denoted by Dye1, Dye2 and Dye3) were studied by hyper-Rayleigh scattering (HRS) technique. Dye2 and Dye3 are dichromophoric systems of Dye1 with combined bridges of different lengths. Because all the samples are ionic species, the classical technique electric- field-induced second-harmonic generation (EFISHG) can not be used to measure their first hyperpolarizabilities (beta) . Further studies showed that the measured (beta) values were greatly enhanced due to the multi-photon fluorescence (MPF) emissions at 532nm, and more accurate (beta) could be estimated after grossly cutting off the MPF from their spectra. It shows that the stilbazolium salts are good candidates with very large first hyperpolarizabilities (in the range of 10-27esu) for optoelectronic applications. The results revealed the dependence of (beta) on the molecular structures such as number of chromophore, (pi) -conjugation length and molecular conformation in the solution of dimethylformamide. The two level mode was used to predict the intrinsic molecular hyperpolarizabilities of these samples.

Paper Details

Date Published: 19 October 2001
PDF: 6 pages
Proc. SPIE 4580, Optoelectronics, Materials, and Devices for Communications, (19 October 2001); doi: 10.1117/12.444928
Show Author Affiliations
Xin Wang, Southeast Univ. (China)
Yiping Cui, Southeast Univ. (China)
Yaochun Shen, Southeast Univ. (China)
Zu-Hong Lu, Southeast Univ. (China)
Fanqing Meng, Shandong Univ. (China)
Xu Dong, Shandong Univ. (China)

Published in SPIE Proceedings Vol. 4580:
Optoelectronics, Materials, and Devices for Communications
Tien Pei Lee; Qiming Wang, Editor(s)

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