Temperature Stability of the Electro-Optic Response of Highly Fluorinated Side Chain Organic Copolymers

摘要

In this work were investigated the second order nonlinear optical properties of a group of Disperse Red 1 based electro-optic fluorinated copolymers, synthesized with two fluorinated monomers: the alpha-fluoroacrylate monomer bearing the 2,2,2-trifluoroethyl side group and the a-fluoroacrylate monomer bearing the Disperse Red 1 chromophore. By means of nonlinear ellipsometry at X = 1550 nm, the poling-induced electro-optic tensor main component r_(33) was retrieved and the stability of the second order nonlinear properties were measured giving a depolarization temperature T_(dep)=114 deg C and an activation energy E_A approx= 60 kcal/mol.