Paper
4 November 2010 Donor strengthening strategy for FTC-based organic nonlinear chromophore
Xianqing Piao, Xianmin Zhang, Shiyoshi Yokoyama, Hideki Miki, Isao Aoki, Akira Otomo
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Abstract
The molecular chromphores with high first hyperpolarizability values have been reported with the development of conjugated polyene-bridge or thiophene-bridge system and strong tricyano-containing heterocyclic electron acceptors. In this work, we investigated the enhancement of the electro-optic response by introducing various groups, such as OCH3, Ophenel, OTBDMS, etc, as an additional donor part on conventional FTC type donor-π-acceptor molecules. These new type donors exhibited a strong solvatochromic effect, indicating an extra donation to the pi-conjugated bridge, which shifted the charge-transfer absorption of the chromophores to the lower energy region. Furthermore, the simple modification on the donor moiety resulted in a great improvement in the first hyperpolarizability and macroscopic electro-optic coefficient (r33) over the benchmark dialkylamino FTC counterparts. For the real applications, the stronger acceptor was adopted to further increase the r33 and such a chromophore was post-functionalized as side-chain polymer to enhance the temporal stability.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Xianqing Piao, Xianmin Zhang, Shiyoshi Yokoyama, Hideki Miki, Isao Aoki, and Akira Otomo "Donor strengthening strategy for FTC-based organic nonlinear chromophore", Proc. SPIE 7846, Quantum and Nonlinear Optics, 784609 (4 November 2010); https://doi.org/10.1117/12.871734
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KEYWORDS
Chromophores

Nonlinear optics

Polymers

Bridges

Absorption

Polymethylmethacrylate

Glasses

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