Novel permanently poled photorefractive polyesters

Stefan Schloter; Uwe Hofmann; K. Hoechstetter; G. Bauml; Dietrich Haarer; Kai Ewert; C.-D. Eisenbach

doi:10.1117/12.328571

29 October 1998 Novel permanently poled photorefractive polyesters

Stefan Schloter, Uwe Hofmann, K. Hoechstetter, G. Bauml, Dietrich Haarer, Kai Ewert, C.-D. Eisenbach

Proceedings Volume 3474, Second-Order Organic Nonlinear Optics; (1998) https://doi.org/10.1117/12.328571
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

We present novel, fully functionalized, photorefractive (PR) polyesters. The chemical design and the material's glass transition temperature well above room temperature allows for permanent poling of these systems. The photorefractive properties were determined via degenerate four-wave mixing and two-beam coupling experiments as a function of the applied external electric field and the degree of permanent poling. Due to the restricted orientational mobility of the chromophores, the PR effect is reduced to an almost pure charge-generation and transport phenomenon. Consequently, the temporal response of the systems is limited by charge- generation or transport processes only. Degradation of the materials is substantially limited because of the covalent attachment of the photoconducting as well as the nonlinear optical moieties to the polymer backbone. No crystallization or phase separation was observed. The system show response times of about 200 ms with (Delta) n approximately equals 1.10^-3. To our knowledge, this work presents the first characterization of PR efficiencies for fully functionalized polymers as a function of the permanent Pockels coefficient (chi) ⁽²).

Citation Download Citation

Stefan Schloter, Uwe Hofmann, K. Hoechstetter, G. Bauml, Dietrich Haarer, Kai Ewert, and C.-D. Eisenbach "Novel permanently poled photorefractive polyesters", Proc. SPIE 3474, Second-Order Organic Nonlinear Optics, (29 October 1998); https://doi.org/10.1117/12.328571

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