Second-order nonlinear optical response of the epoxy-based thin films with azo-chromophores

Second-order NLO characteristics of thin films based on model epoxy amine oligomers with 4-amino-4'-nitroazobenzene chromophore in the main chain, containing hydroxyl and methacryloyl groups, CFAO and CFMAO, respectively, are determined. Synthesized polymers possess high content of chromophore fragments and have good film-forming properties, which allowed one to cast homogeneous films of 200-400 nm thickness. The presence of reactive groups in the monomer units makes it possible to use cross-linking of polymer matrix to preserve the chromophores orientation order achieved in the course of corona poling and to provide relaxation stability of the second-order NLO response. Rather high values of the nonlinear optical coefficients estimated by second harmonic generation technique allow one to consider these epoxy amine polymers as promising candidates for the construction of cross-linked polymer matrices with long-term stability of the quadratic NLO response at elevated temperatures.

[1]  A. T. Ponomarenko,et al.  Generation of the second harmonic of laser radiation in noncentrosymmetrical polymeric systems , 1998 .

[2]  Francois Kajzar,et al.  Polymeric Materials and their Orientation Techniques for Second-Order Nonlinear Optics , 2003 .

[3]  J. D. Swalen,et al.  Second‐order nonlinear optical properties and relaxation characteristics of poled linear epoxy polymers with tolane chromophores , 1991 .

[4]  R. Gerhard-Multhaupt.  Nonlinear optical polymer electrets , 1996, 9th International Symposium on Electrets (ISE 9) Proceedings.

[5]  Donald M. Burland,et al.  SECOND-ORDER NONLINEARITY IN POLED-POLYMER SYSTEMS , 1994 .

[6]  L. Giorgini,et al.  Methacrylic polymers bearing side-chain permanent dipole azobenzene chromophores spaced from the main chain by chiral moieties: synthesis and characterization , 2001 .

[7]  Antao Chen,et al.  Progress toward device-quality second-order nonlinear optical materials. 1. Influence of composition and processing conditions on nonlinearity, temporal stability, and optical loss , 1998 .

[8]  Peter G. R. Smith,et al.  Synthesis and characterization of methacrylate-based copolymers for integrated optical applications , 2002 .

[9]  Stephen T. Kowel,et al.  Second-harmonic generation and absorption studies of polymer-dye films oriented by corona-onset poling at elevated temperatures , 1989 .

[10]  Xiaogong Wang,et al.  Heteroaromatic Chromophore Functionalized Epoxy-Based Nonlinear Optical Polymers , 1998 .

[11]  Xiaogong Wang,et al.  Epoxy-Based Nonlinear Optical Polymers Functionalized with Tricyanovinyl Chromophores , 1997 .

[12]  Larry R. Dalton,et al.  Synthesis and Processing of Improved Organic Second-Order Nonlinear Optical Materials for Applications in Photonics , 1995 .

[13]  J. Kumar,et al.  Novel Crosslinked Guest-Host System with Stable Second Order Nonlinearity , 1992 .

[14]  Xiaogong Wang,et al.  Epoxy-Based Nonlinear Optical Polymers from Post Azo Coupling Reaction , 1997 .

[15]  Jiann T. Lin,et al.  Poled polymeric nonlinear optical materials. Exceptional second harmonic generation temporal stability of a chromophore-functionalized polyimide , 1992 .

[16]  Zhang Xinxin,et al.  The second-order nonlinear optical properties of a series of polyesters containing push-pull azobenzene chromophore in their side chain , 1999 .

[17]  Bruce H. Robinson,et al.  Rational Design of Organic Electro-Optic Materials , 2001 .

[18]  P. Rochon,et al.  Effect of crosslinking on the photoinduced orientation of azo groups in thin polymer films , 2001 .

[19]  Jayant Kumar,et al.  Self-assembled second order nonlinear optical multilayer azo polymer , 1997 .

[20]  Larry R Dalton,et al.  Electric field poled organic electro-optic materials: state of the art and future prospects. , 2010, Chemical reviews.