The synthesis of branched TCP chromophores and the research on their electro-optical properties

Shuhui Bo; Zhuo Chen; Wu Gao; Zhen Zhen; Xinhou Liu

doi:10.1117/12.928844

11 October 2012 The synthesis of branched TCP chromophores and the research on their electro-optical properties

Shuhui Bo, Zhuo Chen, Wu Gao, Zhen Zhen, Xinhou Liu

Proceedings Volume 8474, Optical Processes in Organic Materials and Nanostructures; 847413 (2012) https://doi.org/10.1117/12.928844
Event: SPIE Organic Photonics + Electronics, 2012, San Diego, California, United States

Abstract

In order to minimize the intermolecular electrostatic interactions and effectively translate high value of chromophore into macroscopic electro-optical (EO) coeffcient (r33), the shape-modification of aniline-pyrroline (TCP) chromophore by combining three kinds of dendritic groups respectively to the N atom of pyrroline acceptor produced three kinds of dendritic chromophores. Their spherical structures can minimize intermolecular electrostatic interactions, and thus the poling efficience was higher than the chromophores without dendritic groups when chromophores as a guest in the host polymer APC. A large electro-optical (EO) coefficient was achieved as high as 75 pm/V at 1315 nm with 9% chromophores loading in APC film. On the basis of the above TCP chromophores, two kinds of novel molecular glasses based on self-assembly dendritic chromophores are also designed and synthesized as second-order nonlinear optical (NLO) materials, which named ETO and ETF. The NLO chromophore glasses ETO and ETF showed excellent filmforming ability by themselves. Their glass transition temperatures (T_g) were determined at 41℃ and 39 ℃, respectively. The in-situ second harmonic generation (SHG) measurement revealed the resonant electro-optical (EO) coefficient (d33) values of 38 and 32 pm/V for the poled films of ETO and ETF, respectively. The results indicate molecular glasses provide a new possible way different from the conventional polymer approach to prepare second-order NLO materials.

Citation Download Citation

Shuhui Bo, Zhuo Chen, Wu Gao, Zhen Zhen, and Xinhou Liu "The synthesis of branched TCP chromophores and the research on their electro-optical properties", Proc. SPIE 8474, Optical Processes in Organic Materials and Nanostructures, 847413 (11 October 2012); https://doi.org/10.1117/12.928844

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KEYWORDS

Chromophores

Electro optics

Polymers

Glasses

Nonlinear optics

Silicon

Magnesium

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