Highly Efficient Photorefractive Organic Polymers Based on Benzonitrile Shiff Bases Nonlinear Chromophores
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- 作者：Victor-Manuel Herrera-Ambriz ; Jos茅-Luis Maldonado ; Mario Rodr铆guez ; Rigoberto Castro-Beltr谩n ; Gabriel Ramos-Ort铆z ; Nancy-Evelyn Maga帽a-Vergara ; Marco-Antonio Meneses-Nava ; Oracio Barbosa-Garc铆a ; Rosa Santillan ; Norberto Farf谩n ; Florian-Xuan Dang ; Pascal G. Lacroix ; Isabelle Ledoux-Rak
- 刊名：Journal of Physical Chemistry C
- 出版年：2011
- 出版时间：December 8, 2011
- 年：2011
- 卷：115
- 期：48
- 页码：23955-23963
- 全文大小：956K
- 年卷期：v.115,no.48(December 8, 2011)
- ISSN：1932-7455
文摘
Photorefractive (PR) materials are ideal for potential applications in real-time optical processing. We report new highly efficient organic photorefractive polymers based on the nonlinear chromophores 4-[(4-(diethylamino)-2-hydroxybenzylideneamino]benzonitrile (Dc) and 4-[4-(diethylamino)benzylideneamino]benzonitrile (Ds). Holographic experiments in a four wave mixing (FWM) and two beam coupling (TBC) geometries were carried out by using a He鈥揘e laser (633 nm). The electric field steady-state diffraction efficiency dependence was measured. Diffraction efficiency as high as 90% was observed for polymers based on Dc at 25 wt % doping level at an external applied electric field around 56 V/渭m. For compounds Dc and Ds, the 渭尾 product was also measured by EFISH technique, Dc presents a value 3.5 times higher than Ds, which is supported by a theoretical prediction; structural X-ray data and their effect on the PR performance are also discussed. Reversible holographic imaging by using these efficient PR polymers is presented.