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Proceedings Paper

Designing effective organic nonlinear (NLO) optical materials
Author(s): Yang Cao; Bo Zhao; Weiliang Zhu; Runlai Zhang
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Paper Abstract

In order to know how we can design effective NLO materials, we have studied several series of aromatic hydrocarbons used as NLO materials and found criteria as follows: (1) When the conjugated system is small then the nitro-group is an effective acceptor, and some of this kind of compound has a very high SHG response while fairly big conjugated compounds whose acceptor is nitro-group often reveal weak or no nonlinearity. (2) The compounds whose acceptor (-NO2) and donor (-NH2, -NHR or -NR2) are para-substituted on both ends of the conjugated chains always have very weak or SHG (second harmonic generation). (3) The substituted groups such as -CH3, -OCH3, -X(-Cl, -Br, -1) and biphenyl (C6H5C6H4-) are the best donors which are beneficial to SHG response and transparency. (4) The relatively big conjugated compounds often reveal fairly good second-order nonlinearity when greater than C equals O acts as their acceptor. We studied these laws theoretically and experimentally so as to give some useful guides to the research of the SHG materials.

Paper Details

Date Published: 3 October 1996
PDF: 6 pages
Proc. SPIE 2897, Electro-Optic and Second Harmonic Generation Materials, Devices, and Applications, (3 October 1996); doi: 10.1117/12.252965
Show Author Affiliations
Yang Cao, Suzhou Univ. (China)
Bo Zhao, Suzhou Univ. (China)
Weiliang Zhu, Suzhou Univ. (China)
Runlai Zhang, Suzhou Univ. (China)

Published in SPIE Proceedings Vol. 2897:
Electro-Optic and Second Harmonic Generation Materials, Devices, and Applications
Manfred Eich; Bruce H. T. Chai; Minhua Jiang, Editor(s)

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