Toward stable materials for electro-optic modulation and photorefractive applications: the hybrid organic-inorganic approach

We have developed hybrid organic-inorganic materials based upon the incorporation of nonlinear chromophores in a rigid amorphous inorganic matrix. Functionalized thin films have been prepared using the sol-gel route allowing for mild synthesis conditions. Push-pull chromophores were either incorporated as guests or grafted on a silica based backbone via a spacer. Orientation of the dipolar chromophores within the materials was performed using the Corona technique. By playing on the structure of the push-pull chromophores and on its orientational stability inside the matrix, functionalized materials with large electro-optic coefficients and excellent stability have been designed. By combining both appropriate push-pull chromophores and photoconductors grafted on the matrix, materials showing interesting photorefractive properties can be obtained without requiring the application of an external electric field. Both the presence of a strong internal field in the poled materials and the occurrence of photo-assisted orientational birefringence plays a significant role.

[1]  W. E. Moerner,et al.  Orientationally enhanced photorefractive effect in polymers , 1994 .

[2]  M. Blanchard‐Desce,et al.  Intramolecular charge transfer and enhanced quadratic optical non-linearities in push pull polyenes , 1997 .

[3]  A. Gharavi,et al.  Hybridized approach to new polymers exhibiting large photorefractivity , 1996 .

[4]  Mark G. Kuzyk,et al.  Mechanisms of quadratic electro-optic modulation of dye-doped polymer systems , 1990 .

[5]  Antao Chen,et al.  Translating microscopic optical nonlinearity into macroscopic optical nonlinearity: the role of chromophore chromophore electrostatic interactions , 1998 .

[6]  Seth R. Marder,et al.  Large Quadratic Hyperpolarizabilities with Donor–Acceptor Polyenes Exhibiting Optimum Bond Length Alternation: Correlation Between Structure and Hyperpolarizability , 1997 .

[7]  A. Jen,et al.  Design and synthesis of chromophores and polymers for electro-optic and photorefractive applications , 1997, Nature.

[8]  Alain Brun,et al.  Stable photorefractive memory effect in sol-gel materials , 1997 .

[9]  Robert J. Twieg,et al.  DESIGN OF OPTIMIZED PHOTOREFRACTIVE POLYMERS : A NOVEL CLASS OF CHROMOPHORES , 1996 .

[10]  Kenneth D. Singer,et al.  Second-order nonlinear-optical properties of donor- and acceptor-substituted aromatic compounds , 1989 .

[11]  J. Zyss,et al.  Very large quadratic nonlinearities in solution of two push-pull polyene series: Effect of the conjugation length and of the end groups , 1989 .

[12]  Yessica De Nardin,et al.  Improved performance of photorefractive polymers based on merocyanine dyes in a polar matrix , 1998 .

[13]  Zhenan Bao,et al.  Photorefractive polymers. 2. Structure design and property characterization , 1993 .

[14]  Nasser N Peyghambarian,et al.  Thermally stable high-gain photorefractive polymer composites based on a tri-functional chromophore , 1998 .

[15]  Michel Dumont,et al.  Photoinduced orientation of azo dyes in polymeric films. Characterization of molecular angular mobility , 1993 .

[16]  H. Katz,et al.  Synthesis and reactions of cyanovinyl substituted benzenediazonium salts for nonlinear optics , 1988 .

[17]  Joseph Zyss,et al.  Push-pull polyenes and carotenoids with enhanced quadratic nonlinear optical susceptibilities , 1994, Photonics West - Lasers and Applications in Science and Engineering.

[18]  Alain Brun,et al.  New nonlinear sol-gel films exhibiting photorefractivity , 1996 .

[19]  Seth R. Marder,et al.  Large First Hyperpolarizabilities in Push-Pull Polyenes by Tuning of the Bond Length Alternation and Aromaticity , 1994, Science.

[20]  Zhenan Bao,et al.  LARGE PHOTOREFRACTIVITY IN AN EXCEPTIONALLY THERMOSTABLE MULTIFUNCTIONAL POLYIMIDE , 1994 .

[21]  J. Zyss,et al.  Chain-length dependence of the quadratic hyperpolarizability of push-pull polyenes and carotenoids. Effect of end groups and conjugation path , 1994 .