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    Charge injection and trapping contributions to the electro-optic response of mesoscopic polymer system

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    Measurements of the second and third order electro-optic response of side-chain copolymer films are reported and discussed in the frame of an extended model taking into account the dependence of the nonlinearity on the orientational distribution of poled copolymers, charge injection and trapping in the films upon application of large voltage drops and screening of the electric field in the mesoscopic films
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